Find the perfect way to say "Happy Birthday Sister" with our guide. Explore heartfelt and funny birthday wishes to make her day unforgettable!

Looking for sister captions? Discover 150 heartfelt and expressive captions to celebrate the bond, memories, and special moments shared with your sister on Instagram. Perfect for any occasion.

They are best friends frequently seen out on the town together. On Tuesday, Kylie Jenner snapped her gal pal Hailey Bieber in an infinity pool, as Hailey smiled holding Kylie's daughter Stormi.