Are you looking for 18th birthday wishes for sister? I know that you love her just like she’s your own. Here are the best happy birthday wishes and 18th birthday wishes to help you find the perfect sentiment.

Happy 18th Birthday Wishes For Sister

1. Dear Sister, How can I begin to tell you how special you are to me without saying that you are the most amazing person in the entire world? Your sweet smile, your beautiful eyes… The way you make me laugh until I scream… What can I say really to capture the essence of who you are? All I can say is that I love you from the bottom of my heart and that will never change. Happy 18th Birthday.
2. Dear Sister, when I think of the word “sister” I think of a best friend. When I think of the words “best friend” I think of you, my dear sister! On the day that we met forever in your heart you promised to look out for me. Nevertheless, I promise to do the same for you…forever. Happy 18th birthday with love!
3. HAPPY 18TH BIRTHDAY SWEETIE! To my only sister, I want to thank you for being so great. You’re the best sister a girl could ask for. I will always love you.
4. Happy 18th Birthday sister. I’m so proud to have you as a sister! I love you dearly, don’t ever forget it. I love that we share so many memories together, they’re really my favorite part of life. Whether it be walking your dog, making brownies or just watching TV, those are the things that make life special. I wouldn’t trade those moments for anything and I hope one day you find someone who makes you feel that way too!
5. Birthdays come and go, but you’ll always be my little sister. No matter how old we get, I still hope that we will find a way in which to have as much fun together as we did as kids. But growing up isn’t really something that is done it is something that just happens. As time goes on and our family grows, taking care of everyone will take up all your time and it won’t be long before you are caring for children. Happy 18th Birthday sister.
6. I’m so glad that I have the coolest big sister in the world. You are an amazing woman who is going to do great things! Happy 18th birthday!
7. You have the coolest, prettiest, most awesome sister in the whole world. I hope you know that! I’m not just saying it because that is what you want to hear. I can confidently say it because it is true. You’re smart, funny and incredibly sweet. Everyone should love you as much as I do. You deserve every wonderful thing this life can offer! Happy 18th Birthday sister.
8. Happy 18th Birthday sister. I found out pretty early that sisters are special. They pick you up when you fall, they share their secrets and they give away all their toys. So I guess it’s not that surprising that I’ve been so lucky to have a sister as wonderful as you are. I hope your big day is absolutely perfect.
9. Happy 18th Birthday sister. I just can’t believe you are a year older. There are so many things I want to say, but they all seem too insignificant compared to how much I love you. You have changed my life in more ways that you could ever know. I just want to thank you for always being there for me, for pushing me when I need it, and for being such an amazing sister. As long as you are around I will always be happy!
10. Happy birthday to the best sister a guy could ask for! The word “best” doesn’t even begin to describe how wonderful you are in every possible way. From being there when I needed a shoulder to cry on, to being my biggest advocate when I really needed some inspiration. Honestly, everyone should have one of you. You would make the world a better place if everyone was more like you! Thanks for everything, and happy 18th birthday from your loving brother.
11. Happy 18th Birthday to my big sister. I am so lucky to have you in my life. You have always been there for me, not matter what. I love you more than you will ever know, and hope your day is perfect!
12. Happy 18th birthday, little sis! You have made me proud every day of your life. You are beautiful and sweet, smart and funny. I love you so much and am so grateful for you in my life. Stay true to yourself, keep your head up and always live with joy. Happy 18th Birthday!
13. Wishing my sister a great big Happy 18th Birthday! Having you as a sister has been one of my favorite things in the universe. I know that your birthday will be another great year filled with smiles, laughter and love – have a wonderful birthday and party!!
14. Dear sister, today you are 18 years old and finally a big girl! May you stay forever young and full of joy? Happy birthday!
15. Happy 18th birthday, little sis! I hope this card finds you on the best day of your life so far. It has been a pleasure to be your sister for 17 years and I’m looking forward to many more wonderful years. Love you bunches!
16. Happy 18th birthday to my dear, sweet little sister! I can’t believe your turning 18! Wow! That’s really grown up now. I love you and will always watch over you. All your friends mom’s and dad’s wish you a very happy birthday too and are so proud of the young lady you have turned out to be. Love Stephanie
17. You mean more to me than the world. I always wanted a sister and now that i have you, I never want to let go. You are so amazing and I love you with all my heart! Happy 18th birthday sis!
18. Happy 18th Birthday to my dearest sister, you are an amazingly talented woman and I look up to you. You are capable of reaching for the stars, with your head held high. I am so proud to know you and to call you my sister. You are the best thing that has ever happened to me and I am so grateful to have you as a part of my life. I really appreciate you being there for me when times were tough and through the good times.
19. Happy 18th birthday my sweet sister! I hope you have a wonderful day…please be sweet and good to all your friends that includes the boys. Love always, Your Big Sister.
20. Happy 18th birthday my sweet sister! Being your big sister sure has its perks. I get to look out for you and make sure that you are taken care of. I will always be here for you and help you through anything life throws at us. You mean the world to me, and I could never imagine my life without you.
21. You are the best sister I could have ever wished for and would have never come true without. Thank you for being my best friend and for being so talented and smart. Happy 18th birthday my sweet sister!
22. Happy 18th birthday my sweet sister! I remember when we were kids and you asked me why you couldn’t stay with me instead of going to live with grandma. I said, “Because there are monsters in my closet and one of them would eat you up.” You said, “Well, when I’m 18 I will come live with you!” Guess what? Today is the day and the monster in my closet came true! I love you so much and can’t wait to come and stay with me.
23. Dear sister. I am so happy that you are turning 18 years old! I know you are going to have an amazing year full of exciting events, friends and parties. The next chapter in your life is going to be the best yet! You deserve the world and I can’t wait to see how far you will go. Happy birthday, I love you and miss you!
24. Happy birthday, my love! It’s hard to believe that your 18th birthday has passed, but I remember the day you were born like it was yesterday. No one else could be a better sister than you. You are always there for me when I need you and we have so much fun together. I hope this day is as wonderful as you are!
25. I love you to the moon and back, infinity and beyond. I know it may seem like we are so different, but we are the best of friends. I have never and will never love anyone quite like I love you. We have been through so much together, more than many people ever experience in their lifetime. You are my soul sister! Happy 18th Birthday!
26. I always wanted to say…. Happy 18th Birthday! You’re now a grown woman which is the best thing in the whole world. I’m so proud of you and I know you will do very well in life. I love you with all my heart, and I can’t wait for the days we grow together. 18 has never looked so good!
27. Before we had ups, downs, and a lot of laughs. It’s crazy that you’re 18 now because our memories make me feel like you’re still only 10 years old. I love you so much my sister and hope that your birthday is as great as you are!
28. Happy 18th birthday! I hope that you have been having an amazing week. I really hope you are having a great time. I can’t believe it. I have known you for my entire life, but just like that you turn 18! What happened to the teenage years? It seemed like yesterday when we spent our afternoons baking cookies and watching movies in pajamas. Time flies when you are having fun and it is so cool to see your dreams unfold right before our eyes.
29. I’m so happy you turned 18, the best birthday gift ever. I’ve been looking forward to this day for so long, and all I really want to say is that I love you, I appreciate you for who you are and I am thankful that you are in my life. You mean so much to me. Happy birthday!
30. Sister, I know today is a special day. The day we celebrate your ‘sweet eighteen’. Today is all about you. And, I just wanted to say that you mean so much to me, and have helped me through so much in my life. I am more proud of you than anything else in the world. You are such a beautiful soul and I am so lucky to be your sister!
31. Happy 1`8th birthday to my dear sister. You are the best ever. I hope you have a great day and many more to come! I love you and will always be there for you if you need me for anything.
32. Happy 18th Birthday Sis, I hate getting older but this isn’t about aging. This is about getting old! The exciting part is that now you get to stop calling me “sir”. Most importantly, you won’t have to call me anymore! You can always find me in the same place, right next to you. Carry your head high and always follow your heart. I’m proud of you and love you more than words could ever say. Have a great happy day.
33. Happy 18th Birthday sister. I’m so glad we established a sibling relationship when you were born. When I see you I feel like I’m the luckiest guy alive and that life truly doesn’t get any better. You are a blessing to our family and I will always be there to support you and your future.