And Bella's reaction is too sweet.
Bella Hadid turns 21 today, but her older sister, Gigi, started celebrating a day early. Yesterday, the model, 22, wished her sibling happy birthday with an adorable throwback photo from the day Bella was born.
In the shot, a toddler-aged Gigi (decked out in a red outfit and pigtails) holds her infant little sis while their mother, Yolanda Hadid, watches over them. "TOMORROW WILL BE 21 YEARS SINCE I MET MY FOREVER BESTIE @bellahadid ❤️ (me wearing all red on your actual day of birth is MAJOR and possibly the reason it's your favorite color 😜)," she wrote in the caption.