If you're lucky enough to have a sister who's also your built-in best friend, you already know it's a virtually unbreakable bond, one that may be hard to understand unless you are a sister yourself. As Rosemary Clooney sang: "Sisters, sisters, there were never such devoted sisters…all kinds of weather, we stick together. The same in the rain or sun, two different faces but in tight places. We think and we act as one."

With a friendship that strong, it's definitely important to celebrate your sister's birthday in a major way! Of course you can buy thoughtful presents, decorate her place, or bake a delicious cake—but heartfelt wishes can make a lasting impression long after the party ends. She might even save the card for years to come!

If you're not sure where to start, you've come to the right place. We've compiled some of the best birthday wishes for your sister that will make her smile (and maybe even shed a few happy tears).

Whether your sister is sentimental, spiritual, a social media queen, or somewhere in between, we have you covered. From short-and-sweet sentiments that will melt her heart, to hilarious, laugh-out-loud messages with fun emojis, these birthday wishes are sure to brighten her special day.

No matter if you write these thoughtful birthday messages and wishes in a card, send via text, or post on social media as an Instagram caption, acknowledging your sister's birthday with kind words (and cheeky emojis) will be appreciated. After all, she is the one who knows all your secrets, knows what makes you tick, and will do (just about!) anything for you. Sure, you may not always see eye to eye, but there's no doubt that her love for you is unconditional. That's why it's important to let her know how much she means to you every chance you get—especially on her birthday.

Heart-Touching Birthday Wishes for Your Sister

• There is no better friend in this world than a sister, and no sister in the world is better than you.
• Beyond proud that you're my sister. Have the best day!
• You're best childhood roommate a kid could ask for.
• Happy to say I'm the proudest member of your fan club. Here's to another year of the best sister in the world!
• Happiest of birthdays to the girl who got me through childhood.
• Sister: A best friend for life. Dependable through thick and thin.
• I loved you at five and I’ll love you at 50. Happy birthday, sister!
• Sibling bonds are one-of-a-kind, and so are you.
• Happy birthday to the sister who lets me cry on her shoulder and always makes me laugh. You deserve the best celebration ever.
• There’s nothing like a built-in best friend! Happy Birthday!
• When times are good and when they're bad, you're the best sister I could ever have. Happy birthday!
• Your presence lights up every room you enter. Happy birthday to the best sister to ever live!
• Sisters are best friends, they are advisers, teachers, and–best of all—people with whom you can talk about anything.
• You are my sounding board, confidante, keeper of secrets—and my best friend.
• Thank you for always being my biggest supporter. Happy birthday to my forever cheerleader.

• Nothing makes me happier than seeing you smile. Wishing you the best birthday yet!
• Growing up, you were always the most beautiful girl in the world to me. That still rings true. Happy birthday, sister!
• You'll always be my greatest role model. HBD, sissy!
• Sibling love today and always! Happy birthday, sister.
• You are one of my biggest inspirations. Wishing you the happiest birthday!
• Sister, you're simply the best! Happy birthday.
• You're one of the sweetest, kindest, and most thoughtful people I know. I'm so grateful that you’re my sister. Happy birthday!
• You have an undeniable sparkle that makes people smile. Happy birthday, sis!
• Your inner and outer beauty combined makes you the most beautiful person on the planet. Wishing you the best birthday!
• Whether I'm having a good day or a bad one, you're always the first person I call. Thank you for always being there for me no matter what. Happy birthday, sister!
• I hit the sister jackpot with you. I hope your special day is just as lucky! Happy birthday.
• As you celebrate another trip around the sun, I hope you realize just how much joy you bring to my life. Happy birthday!
• I can't imagine my life without you. Thank you for being an awesome sister. Wishing you an amazing birthday!
• You were my first friend and will always be my best. Happy birthday, sister.
• When you blow out your candles and make wishes, I hope that they all come true. Happy birthday, sissy.
• Through thick or thin, I can always count on you. That's why I hope you enjoy your special day to the fullest! Happy birthday, sister.
• Sister bonds are one-of-a-kind. I'm so grateful to know this firsthand. Happy birthday!
• I'm so lucky to have a beautiful and kind-hearted sister like you. I hope you have a wonderful birthday.
• It's an honor to be the sister of someone so compassionate and kind. Happy birthday to the best sister ever!
• I don't know what I did to deserve a sister like you! They don’t make them like you anymore. I'm forever grateful. Happy birthday!