Supermodels and longtime besties Cara Delevingne and Kaia Gerber just got matching tattoos! The British actress and model Cara celebrates her 28th birthday today, and to commemorate the day Kaia, 18, took to her Instagram Stories to post a tribute for her. “Happy birthday to my solemate @caradelevingne,” Kaia captioned a photo in which her and Cara‘s feet and hands were intertwined. Kaia also shared a close-up photo that showed off the new matching tattoos on their feet.