Take a look through this gallery to see if you can remember what Hollywood's cutest kids once looked like—or if you recognize them now!
Which kids have changed the most? Tell us your opinion in the comments section or on Twitter @OKMagazine.
This little girl grew up going to movie sets and concerts.
Apple Blythe Alison Martin, Gwyneth Paltrow's daughter with singer Chris Martin, just turned 9. “We’re having a disco party in the house," Gwyneth said of Apple's May 14 birthday bash. " I have to get her food organized. She’s so specific.”
Red carpets were nothing out of the ordinary for this kid!
Actress Heather Locklear and rocker Richie Sambora's now 15-year-old daughter, Ava Sambora, recently made her big acting debut in the movie "This is 40."
This lguy was named after a major city.
It's hard to believe that David and Victoria Beckham's son, Brooklyn, is already 14!
This tyke has always been the coolest kid in the sandbox!
How could 7-year-old Kingston Rossdale not have the best style with parents like Gwen Stefani and Gavin Rossdale!
It wasn't that long ago that this celebrity spawn was riding bikes with training wheels. Now she's marketing her own clothing line with her megastar mom!
Madonna's daughter Lourdes Leon will celebrate her seventeenth birthday in October.
This looker is the apple of his mother's eye and the oldest of his five siblings.
Maddox Jolie-Pitt just made a rare appearance on the red carpet at his dad Brad Pitt's "World War Z" premiere in London. Angelina Jolie's first son, Maddox, will officially become a teenager when he turns 13 in August.
These twins are doubly adorable!
Sarah Jessica Parker and Matthew Broderick's twin girls Marion and Tabitha were born by surrogate on June 9, 2009.
This little girl was instantly Hollywood royalty when she was born in April 2006.
Suri now must split her time between her divorced parents Tom Cruise and Katie Holmes.
Maybe you won't recognize this one without her glasses?
Violet Affleck, who turns 8 in December, is often spotted on her way to school with her dad Ben Affleck or mom Jennifer Garner.
These two cuties already have pretty solid careers despite their young age.
Jaden, who turns 15 in July, is now in the major motion picture "After Earth" with his dad, Will Smith, while his 13-year-old sister, Willow, is best known for her hit song about whipping hair.