While famous celebrity children like Kaia Gerber and Sofia Richie have been in the spotlight for years, Apple Martin has stayed very under the radar. (She still has a private Instagram account, for starters.) Gwyneth Paltrow and Chris Martin's daughter just celebrated her 16th birthday, and to celebrate, Paltrow posted a rare photo of her lookalike kid. Martin wore what happens to be my favorite piece from Reformation's sitewide sale: the Laurelai Dress ($174).

"I can't believe I'm actually writing these words but... happy sweet sixteen my darling girl," Paltrow captioned her Instagram. "You are the light of my heart, you are pure joy." Scroll down to see a rare photo of Apple Martin compared to her mom in the '90s. Plus, shop her on-sale Reformation dress before it's gone.

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