Everyone grows up, but for some reason, it's strangest when it happens to celebrity kids.
Especially Alexa Ray Joel — daughter of Billy Joel and model, Christie Brinkley — who's transformed into a beautiful 29-year-old woman right before our eyes. We remember her when she was the tiniest little thing!
Just look at her latest Instagram post on the beach for more proof!
Although the brunette beauty has been accused of plastic surgery to alter her looks in the past, she claims she's aged naturally.
"On a personal (and slightly ridiculous note): I would just like to add that all of the continuously-circulating rumors that I have had extensive 'face-work' and undergone breast-augmentation surgery is simply and entirely 100% false," she said on Instagram.
Click through to see more celebrity kids all grown up!
The 14-year-old daughter of Cindy Crawford and Rande Gerber.