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139 Of The Most Adorable Happy Birthday Sister In Law Messages

139 Of The Most Adorable Happy Birthday Sister In Law Messages

Just because you’re not blood-related doesn’t mean you shouldn’t celebrate the birth of your husband’s sister or your brother’s wife, so here are some good happy birthday sister in law messages.

Happy birthday sister in law quotes don’t have to be anything fancy.

Just putting in the effort with a special message for her big day is more than likely to bring a smile to her face – not to mention that you’ll definitely score some extra brownie points with your husband (or brother)!

Aside from those extra points though, having good relations with the sis-in-law really comes in handy, and every new family member should be welcome in both households.

While most of these messages are rather long, which means they’re unlikely to fit on a birthday cake, they make for more than adequate birthday card messages to wish your beloved sister-in-law a happy b’day.

So what are some of the best birthday wishes you can deliver to this wonderful person who lights up her brother’s life? Read on to find out!

Best Happy Birthday Sister In Law Messages

To have a truly amazing birthday, everyone needs to get some of the best birthday greetings, and your special sister is no exception.

Sure, she’s not your real sister, but that doesn’t change how much she means to you, nor does it stop you from saying ‘I love you’ in your own special way.

Here are some of the best examples:

1. ‘Happy birthday to an amazing sister in law! I don’t know how our family would cope without you!’ – Unknown

2. ‘Warmest wishes to my amazing sister in law. I hope your day is filled with many fond memories! Happy Birthday.’ – Unknown

3. ‘To my incredible sister in law, you have become such a big part of our family. We would all be lost without you. Wishing you a very Happy Birthday with many more to come!’ – Unknown

4. ‘Happy birthday to my amazing sister in law! I am beyond blessed, because not only are you an amazing friend but you are also my incredible sister in law. I hope your day is as wonderful as you are!’ – Unknown

5. ‘I thought I was the one that was meant to give a gift when my brother got married, but instead, he gave me the best gift possible, you! You are the best sister in law anyone could wish for! Happy Birthday!’ – Unknown

6. ‘To my sister in law, Happy Birthday! Today, and every day, we are all so grateful to have you in our family.’ – Unknown

7. ‘I want to take a moment to wish you, my dearest sister in law, a wonderful birthday!’ – Unknown

8. ‘Our family just wouldn’t be the same without you. And as far as sister in laws go, you can’t be beaten. Wishing you a Happy birthday!’ – Unknown

9. ‘To my sister in law, Happy Birthday! You are a wonderful gift treasured by our whole family! Wishing you many new cherished memories on your special day!’ – Unknown

10. ‘Votes are in and it was unanimous. You are the best sister in law there is! Happy Birthday!’ – Unknown

11. ‘Happy Birthday my sister in law! Thanks for making the bad times good and the good times unforgettable.’ – Unknown

139 Of The Most Adorable Happy Birthday Sister In Law Messages:

12. ‘Happy Birthday Sis! I’m so grateful to have a wonderful sister-in-law like you in my life. Thank you for being such an important person in my life.’ – Unknown

13. ‘Happy Birthday to my sister in law! Wishing you as much joy and happiness as you have brought into our family in your very special way.’ – Unknown

14. ‘Thinking of you on your special day! Happy Birthday Sister In Law!’ – Unknown

15. ‘When I think of all the blessings in my life, you are right there at the very top of the list! Happy Birthday Sister In Law!’ – Unknown

16. ‘Happy birthday my wonderful sister in law, I hope you have a magical day!’ – Unknown

17. ‘There’s no friend like a sister in law and no sister in law quite like you! Happy Birthday!’ – Unknown

18. ‘The greatest gift my brother ever gave me was you. Happy Birthday my wonderful sister in law!’ – Unknown

19. ‘My sister in law, I think you’re worth celebrating every single day, but especially today. I hope you have an amazing day! Happy Birthday!’ – Unknown

20. ‘It’s so wonderful having a sister in law like you! Thanks for bringing so much joy and happiness into our family. Wishing you a very Happy Birthday!’ – Unknown

21. ‘Happy birthday my sister in law! I am so grateful you came into my world; my life just wouldn’t be the same without a loving sister in law like you to share the many precious moments with.’ – Unknown

22. ‘Just in case you didn’t know by now, I have the best sister in law in the world! Wishing you a very Happy birthday!’ – Unknown

23. ‘Of all the sister in laws in the world, I am so glad you’re mine! Happy Birthday!’ – Unknown

Short Sister In Law Birthday Quotes

For those of you who want to keep it brief and not fill the entire birthday card with long-winded messages to your new and sweet sister, turn to some of these brief little quotes for inspiration:

1. ‘Today is all about celebrating you and all the wonderful ways you make this world a better place! Happy birthday my sister in law, we are so grateful to have you in our lives!’ – Unknown

2. ‘Sending you lots of love on your birthday. You’re such an incredible sister in law and I’m so thankful to have you in my life. Happy birthday!’ – Unknown

3. ‘To my sister in law, Happy birthday! Here’s to another year older, another year wiser, and another year of being the fabulous you!’ – Unknown

4. ‘To my sister in law, I want to wish you an amazing year ahead, filled with love, laughter, and happiness. Happy Birthday!’ – Unknown

5. ‘Happy birthday to my sister in law and my best friend.’ – Unknown

6. ‘I’m so honored to call you my sister in law. Happy Birthday!’ – Unknown

7. ‘Today we’re all celebrating you! Happy birthday my wonderful sister in law!’ – Unknown

8. ‘Happy birthday to the best sister in law there is.’ – Unknown

9. ‘Happy Birthday to my sister in law! Wishing you all the best today and throughout the year ahead!’ – Unknown

10. ‘Happy Birthday my sister in law, we love and appreciate you!’ – Unknown

11. ‘Happy birthday to my sister in law! I hope you have an amazing day, and an even more amazing year ahead!’ – Unknown

12. ‘To my sister in law, there’s never a dull moment with you around, thanks for all the fun and laughter you bring into our lives! Happy birthday!’ – Unknown

13. ‘If I could choose anyone to be my sister in law, I would still choose you! You’re the best sister in law anyone could ask for! Wishing you a very happy birthday!’ – Unknown

14. ‘Happy birthday to my amazing friend and an incredible sister in law!’ – Unknown

Short Sister In Law Birthday Quotes:

15. ‘Happiness is having you as my sister in law! Happy Birthday!’ – Unknown

16. ‘Happy Birthday my dear sister in law! I hope you enjoy your special day!’ – Unknown

17. ‘Wishing you, the greatest sister in law ever, a happy birthday!’ – Unknown

18. ‘Happy birthday to the best sister in law in the world.’ – Unknown

19. ‘Sending hugs, kisses, and birthday wishes to my amazing sister in law!’ – Unknown

20. ‘To my sister in law, sending the most loving birthday wishes your way! I hope you have a wonderful birthday!’ – Unknown

21. ‘Here’s to the most amazing sister in law anyone could ask for! Happy Birthday!’ – Unknown

22. ‘To my sister in law, wishing you a day filled with love and joy. Nobody deserves it more than you! Happy birthday!’ – Unknown

23. ‘Happy birthday to my beautiful sister in law! You may not have been born my sister, but you’re my sister all the same!’ – Unknown

24. ‘Happy birthday my lovely sister in law!’ – Unknown

25. ‘Happy Birthday to my sister in law! May today be a day you’ll never forget!’ – Unknown

26. ‘To my sister in law, there are certain things in life that exceed our expectations. You’re one of them. Thank you for coming into my life and filling it with your love and joy. Wishing you a very Happy Birthday!’ – Unknown

Awesome Sister In Law Happy Birthday Messages

Birthdays only come around once a year, so it’s only natural to want to make each of them feel special, especially when it concerns your loved ones, your sister in law (and brother in law!) included.

So, here are some more awesome quotes I found that make for perfect birthday messages:

1. ‘Happy birthday, my sister in law! Just remember a birthday is just the first day of another 365-day journey around the sun. Make sure you enjoy the trip!’ – Unknown

2. ‘You’ve been my sister in law for a while now, and over the years you have given me so many reasons to smile. So, today on your birthday, I hope to return the favor! Wishing you a wonderful birthday filled with all the warmth, happiness, and joy to give to everyone around you.’ – Unknown

3. ‘The most heartfelt wishes to my incredible and dear sister in law! You mean so much to me. I wish you all the happiness in the world on your birthday! – Unknown

4. ‘Happy birthday, my sister in law! Wishing you a fantastic day and letting you know that I am thinking of you and sending my love your way!’ – Unknown

5. ‘I’m so lucky to have such a fun and fabulous sister in law like you! I hope your day is full of moments as beautiful as you!’ – Unknown

6. ‘Today is your birthday, a day just for you. So, enjoy every minute, whatever you do. Happy birthday my wonderful sister in law!’ – Unknown

7. ‘It’s a wonderful thing to have a dear sister in law like you. I hope your birthday is filled with all the happiness and love that you have brought into our lives. Happy Birthday!’ – Unknown

8. ‘Happy Birthday my sister in law! I hope you have an incredible day filled with all the things that make you happy! – Unknown

9. ‘A sister in law as special as you deserves to be celebrated every day in every way. I hope you have an amazing day! Happy Birthday!’ – Unknown

10. ‘If only everyone had an amazing sister in law like you! The world would be a much better place. Happy birthday!’ – Unknown

11. ‘To my sister in law, today is your special day, so make a wish, blow out your candles, and have the best day ever! Happy Birthday!’ – Unknown

12. ‘May this special day bring you endless joy and tons of precious memories! Happy birthday my dear sister in law!’ – Unknown

Awesome Sister In Law Happy Birthday Messages:

13. ‘As a sister in law you’re great. As a friend, you’re the best. To have you in our family makes us all truly blessed! Wishing you a very happy birthday my beautiful sister in law!’ – Unknown

14. ‘To my dear sister in law, every day I am reminded of how lucky I am to have a supportive, caring, and wonderful sister in law like you as my best friend! I hope your birthday is as amazing as you are!’ – Unknown

15. ‘You are everything that I could have asked for in a sister in law and more. Wishing you a Happy Birthday!’ – Unknown

16. ‘To my beautiful sister in law, thank you for making our family stronger by being in it. You are a loving wife and an amazing friend. I feel so blessed to have you for a sister-in-law and a friend.’ – Unknown

17. ‘Happy Birthday to my beautiful sister in law! We are so thankful to have you as part of our family. Today and always.’ – Unknown

18. ‘Not a day goes by that I am not thankful to have you in my life. Happy Birthday my dear sister in law.’ – Unknown

19. ‘Happy birthday dear sister in law. You are a true blessing and I am so grateful to have you in my life!’ – Unknown

20. ‘Happy birthday to my wonderful sister in law! What an honor it is to travel through life with a sister in law like you right here next to me.’ – Unknown

21. ‘Happy Birthday my sister in law! Even though we’re miles apart, you’re on my mind and in my heart.’ – Unknown

22. ‘To my sister in law, I hope you get to relax and enjoy your special day. Wishing you a very happy birthday!’ – Unknown

23. ‘Happy birthday to a great sister in law, a wonderful friend, and an all-around amazing person.’ – Unknown

24. ‘Happy birthday my beautiful sister in law. May God bless you with all the most wonderful things that you deserve in this life.’ – Unknown

25. ‘I want to wish you all the love and happiness in the world and give you all of the wishes you deserve. Happy birthday my dear sister in law!’ – Unknown

26. ‘The best thing my brother has ever done was marry you! You are a blessing to us all! Happy birthday my dear sister in law!’ – Unknown

27. ‘To my beautiful sister in law, may the year ahead be your best one yet! Happy birthday!’ – Unknown

28. ‘When I count my blessings, I count you twice. Happy birthday to my dear sister in law and my best friend.’ – Unknown

29. ‘My brother has done a lot of stupid, crazy things in his life, but marrying you was definitely not one of them. In fact, marrying you was the smartest thing he has ever done! Thank you for loving my brother and becoming such a valued member of our family. Wishing you a very happy birthday!’ – Unknown

30. ‘You are many things to so many people, a beloved daughter, a treasured wife, a wonderful friend and today we want to say thank you for all the joy and happiness you bring into our lives. Wishing you a day full of love and happiness. Happy birthday my dear sister in law!’ – Unknown

31. ‘Dear sister in law, don’t ever change! Stay as amazing as you are. Happy birthday!’ – Unknown

32. ‘Happy birthday to my beautiful sister! My life is better because you are in it.’ – Unknown

33. ‘Roses are red, violets are blue, I couldn’t have wished for a sister in law better than you. Happy birthday!’ – Unknown

34. ‘To my dear sister in law, wishing you a very special birthday in every way. Happy birthday.’ – Unknown

35. ‘To my beautiful sister in law, because of you, I will always have a friend. Wishing you the happiest of birthdays.’ – Unknown

36. ‘You may be my sister in law, my brother’s wife, but you are also my dear friend and a valued member of our family. I hope your special day is as wonderful as you are! Happy Birthday!’ – Unknown

37. ‘I feel so blessed that you are my sister in law and my best friend! I couldn’t have wished for a better sister in law than you! I hope your birthday is as amazing as you are!’ – Unknown

38. ‘To my sister in law, because of you, I laugh a little harder, cry a little less, and smile a lot more. Thank you! Wishing you a wonderful and very happy birthday!’ – Unknown

39. ‘Happy birthday! You’ve always been a patient and loving sister in law. I appreciate you!’ – Unknown

40. ‘My dear sister in law, may your special day be full of love, happiness, magical moments, and wonderful surprises. You deserve all these things and more. Happy Birthday!’ – Unknown

41. ‘When my brother married you, we both lucked out! He gained a beautiful loving wife and I had gained a wonderful new friend. Wishing you a day filled with as much love and happiness as you have brought into our lives. Happy birthday my dear sister in law!’ – Unknown

42. ‘You may be my sister in law, but you are more like a sister. Happy Birthday!’ – Unknown

43. ‘Happy birthday to the sister I always dreamed of having, my sister in law!’ – Unknown

44. ‘I am so grateful to have a dear sister in law like you. Thank you for always having my back. Happy birthday!’ – Unknown

45. ‘My dear sister in law, on your special day I would like to thank you for all that you do for me and our whole family! Wishing you the happiest of birthdays!’ – Unknown

46. ‘It is a true blessing to have such a fun, smart, and beautiful sister in law like you. I hope you have an unforgettable birthday, full of everything that you love most!’ – Unknown

47. ‘Each and every day I feel so lucky to call you my dear sister in law. Enjoy your special birthday, you deserve it! Happy Birthday!’ – Unknown

48. ‘Happy birthday my beautiful sister in law. May your day be as beautiful as you are.’ – Unknown

49. ‘I want to express my gratitude for all the love and care that you have given me. Happy birthday my lovely sister in law, wishing you the happiest of all birthdays!’ – Unknown

50. ‘A beautiful and loving sister in law like you is worth a thousand friends! Happy Birthday! I am so glad that you came into my life.’ – Unknown

51. ‘Today may be your birthday, but I’m the one celebrating as I am the lucky one that gets to have you for a sister in law! Happy Birthday!’ – Unknown

52. ‘Happy birthday my dear sister in law! Thank you for always being there for me.’ – Unknown

53. ‘To my beautiful sister in law, may all your dreams come true on your special day. Happy Birthday!’ – Unknown

54. ‘To my sister in law, wishing you every beautiful thing that can be wished! Happy Birthday!’ – Unknown

Heartfelt Happy Birthday Sister In Law Quotes

The happiest birthday wishes are the ones that come from the heart.

They show your sister-in-law just how wonderful your newfound sisterhood with her is and how you consider her to be an awesome sister in every aspect.

Here are some simple examples that manage to accomplish that in just a few lines:

1. ‘Happy Birthday, to the smartest, bestest, prettiest, and most wonderful sister in law of them all! I hope your day is as incredible as you are!’ – Unknown

2. ‘Happy birthday to the best sister in law! May your day shine as bright as you do!’ – Unknown

3. ‘To my sister in law, thank you for always being there for me. I honestly do not know where I’d be without your advice and support! I hope you have an amazing day. Happy Birthday!’ – Unknown

4. ‘To my sister in law, sending you lots of love and hugs on your birthday. Happy Birthday!’ – Unknown

5. ‘To my sister in law, wishing you a very happy and healthy birthday on your special day!’ – Unknown

6. ‘To my sister in law, I count my blessings every day and one of them is how lucky I am to have a sister in law like you. Happy Birthday!’ – Unknown

7. ‘To my amazing sister, I hope today, and every day, you remember how loved you really are. Happy Birthday!’ – Unknown

8. ‘Happy birthday to my sister in law! I hope you have a fabulous day and be sure to eat an extra slice of cake for me!’ – Unknown

9. ‘To the best sister in law there is, may your day be full of fun, laughter, and cake! Happy Birthday!’ – Unknown

10. ‘I’m so grateful for a sister in law like you. I hope your birthday is as special as you are to me. Happy birthday!’ – Unknown

Heartfelt Happy Birthday Sister In Law Quotes:

11. ‘Happy birthday to the best sister in law there is! You brighten the lives of everyone around you with your warm smile and beautiful soul. I hope you have the most wonderful day!’ – Unknown

12. ‘Happy birthday to my sister in law! May your day be as special as you are to me.’ – Unknown

13. ‘To my sister in law, there are a lot of sister in laws in the world, but you are without a doubt the best. Happy birthday!’ – Unknown

14. ‘Happy birthday to my loving sister in law who always puts a smile on everyone’s face. Today I hope to return the favor!’ – Unknown

15. ‘We are sister in laws by chance, but we are best friends by choice. I hope you have the best birthday possible!’ – Unknown

16. ‘Thank you for every hug, word of encouragement, and act of love you’ve given me. You are the best sister in law there is. Happy Birthday!’ – Unknown

17. ‘Happy Birthday to the best sister in law anyone could hope for! You’re one in a billion!’ – Unknown

18. ‘It’s your birthday and I’m sad I can’t be there. But I’ll send you a special birthday wish and a little prayer. Have an amazing day my wonderful sister in law, happy birthday!’ – Unknown

19. ‘Happy birthday to the most beautiful sister in law and my best friend. You have always been there whenever I need you, thank you!’ – Unknown

20. ‘Happy birthday to my sister in law, who is also my best friend in the whole world. You mean everything to me. Wishing you an amazing day!’ – Unknown

21. ‘Happy birthday to my gorgeous sister in law. Today we celebrate another year of the wonderful you!’ – Unknown

22. ‘To my sister in law on your birthday. I hope you have an amazing day filled with all the love and happiness you so greatly deserve. Wishing you a very happy birthday!’ – Unknown

23. ‘Wishing the best birthday to the best sister in law there is.’ – Unknown

Funny Birthday Wishes For Your Sister in Law

For those of you who’ve developed such a great bond with your sis in law that cracking jokes at each other’s expense is the norm or you use some quirky contact names for each other, here are some quotes that you may end up enjoying.

After all, it’s not a happy birthday without a little bit of laughter:

1. ‘Have a wonderful birthday celebration, dear sister-in-law. May you survive the next year’s mental breakdowns. Love yaa.’ – Unknown

2. ‘May your sweetness not vanish with age; rather, may you age like a fine wine. Happiest birthday, sister-in-law.’ – Unknown

3. ‘I love you more than Queen Elizabeth II loves to wear a hat. And, I love you more than my brother loves you. So, please accept my most heartfelt wishes on your birthday dear sister-in-law, and do invite me to eat the cake.’ – Unknown

4. ‘I have a lot of in-laws but the only in-law I can go to for genuine advice and love is you. Happy birthday to my beautiful sister-in-law.’ – Unknown

5. ‘Happy birthday to a sister-in-law who is the darling of the family, the apple of her mother’s eye, queen of her husband’s heart, and the spark of her brother’s life. Last but not the least, you are my favorite too.’ – Unknown

6. ‘I hope you get to eat whatever you want in the year ahead and that you don’t get fat in the process! Happiest birthday, dear sis-in-law.’ – Unknown

Funny Birthday Wishes For Your Sister in Law:

7. ‘What can I do to make you believe that Facebook did not remind me of your birthday this time! Happy Birthday to the prettiest sister-in-law in the world. BTW, Facebook does remind my brother though.’ – Unknown

8. ‘I know my brother is jealous because I love to have you around me always. Happy Birthday, dearest sister-in-law.’ – Unknown

9. ‘Of all the presents I got from the marriage ceremony, you are the cutest and most blessed gift of my life. Happy birthday, dear sister-in-law.’ – Unknown

10. ‘Happy birthday, sister-in-law. Please don’t count the candles on the cake, or your day might start with tears.’ – Unknown

11. ‘Thank God that I have a sister-in-law like you who tells me all her brother’s deep and darkest secrets. Otherwise, I wonder how I would tease and taunt my husband. Happy birthday.’ – Unknown

12. ‘God knew we were meant to be together; thus, He sent you as my sister-in-law. Now the whole family is scared of our duo. Many happy returns of the day, partner in crime.’ – Unknown

13. ‘I’m not gonna lie, I’m a little jealous today because all the focus and attention of the family has shifted from me to you. But deep down in my heart, I know that you deserve it – mostly. Happy birthday, dear sister-in-law.’ – Unknown

In Conclusion

There’s nothing better than receiving sincere happy birthday wishes from people who aren’t your blood-related family because it feels somewhat extra special.

That’s why giving out happy birthday sister in law quotes is so important. It feels kind of expected with our blood relatives whereas receiving this from your brother’s wife or your husband’s sister, it feels really heartfelt and special.

With that in mind, try to make your new sister’s day of birth extra special every year and I’m sure she’ll return the favor.

Oh, and don’t forget to get her a nice gift. Until next time, mammas!

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