What Bella Thorne looked like then: Paul Redmond / WireImage / Via Getty Images
What Bella Thorne looks now: Denise Truscello / Getty Images for The Latin Recording Academy
What Zac Efron looked then: Jeff Kravitz / FilmMagic / Via Getty Images
What Zac Efron looks like now: Jeff Bottari / Zuffa LLC / Via Getty Images
What Raven-Symoné looked like then: Matthew Simmons / Getty Images
What Raven-Symoné looks like now: Kevin Winter / Getty Images
What Demi Lovato looked like then: Steve Granitz / WireImage / Via Getty Images
What Demi Lovato looks like now: Emma Mcintyre / Getty Images for iHeartMedia
What Dylan and Cole Sprouse looked like then: Chad Buchanan / Getty Images
What Dylan and Cole Sprouse look like now: Gregg Deguire / FilmMagic / Via Getty Images
What Raviv Ullman looked like then: Mark Mainz / Getty Images
What Raviv Ullman looks like now: Ben Gabbe / Getty Images for Beachside Films
What Miley Cyrus looked like then: Photo by Frazer Harrison / Getty Images for ACMA
What Miley Cyrus looks like now: Amy Sussman / WireImage / Via Getty Images
What Hilary Duff looked like then: Robert Mora / Getty Images
What Hilary Duff looks like now: Amy Sussman / Getty Images for Baby2Baby
What Zendaya looked like then: Photo by Adam Larkey/Disney Channel via Getty Images
What Zendaya looks like now: Marc Piasecki / WireImage / Via Getty Images
What Selena Gomez looked like then: Jason Merritt / FilmMagic / Via Getty Images
What Selena Gomez looks like now: Photo by Mike Coppola / Getty Images for Rare Beauty
What Monique Coleman looked like then: Frazer Harrison / Getty Images
What Monique Coleman looks like now: Frazer Harrison / Getty Images
What Brenda Song looked like then: Steve Granitz / WireImage / Via Getty Images
What Brenda Song looks like now: Rich Fury / Getty Images for Gucci
What Vanessa Hudgens looked like then: Jon Kopaloff / FilmMagic / Via Getty Images
What Vanessa Hudgens looks like now: Amanda Edwards / Getty Images
What Corbin Bleu looked like then: Frederick M. Brown / Getty Images
What Corbin Bleu looks like now: Walter Mcbride / WireImage / Via Getty Images
What Kyla Pratt looked like then: Frederick M. Brown / Getty Images
What Kyla Pratt looks like now: Prince Williams / WireImage / Via Getty Images
What Ryan Merriman looked like then: Kevin Winter / Getty Images
What Ryan Merriman looks like now: What Lalaine looked like then: Vince Bucci / Getty Images
What Lalaine looks like now: Amanda Edwards / Getty Images
What Ashley Tisdale looked like then: Stephen Shugerman / Getty Images
What Ashley Tisdale looks like now: Amy Sussman / Getty Images
What Camila Belle looked like then: Photo by SGranitz / WireImage / Via Getty Images
What Camilla Belle looks like now: Jean Baptiste Lacroix / Getty Images
What A.J. Trauth looked like then: Frank Trapper / Corbis via Getty Images
What A.J. Trauth looks like now: What the Jonas Brothers looked like then: Mike Marsland / WireImage / Via Getty Images
What the Jonas Brothers look like now: Phillip Faraone / Getty Images for Netflix
What Kimberly J. Brown looked like then: Peter Kramer / Getty Images
What Kimberly J. Brown looks like now: Alberto E. Rodriguez / Getty Images
What Christy Carlson Romano looked like then: Frazer Harrison / Getty Images
What Christy Carlson Romano looks like now: What Camille Guaty looked like then: Photo by SGranitz / WireImage / Via Getty Images
What Camille Guaty looks like now: Photo by Tibrina Hobson / Getty Images
What Mitchel Musso looked like then: Noel Vasquez / Getty Images
What Mitchel Musso looks like now: What Tahj Mowry looked like then: Disney +
What Tahj Mowry looks like now: Matt Winkelmeyer / FilmMagic, / Via Getty Images
What Steven Anthony Lawrence looked like then: Amanda Edwards / Getty Images
What Steven Anthony Lawrence looks like now: Rodin Eckenroth / Getty Images
What Kirsten Storms looked like then: Steve W. Grayson / Getty Images
What Kirsten Storms looks like now: Scott Kirkland / ABC via Getty Images
What Adrienne Bailon-Houghton looked like then: Photo by Frazer Harrison / Getty Images
What Adrienne Bailon-Houghton looks like now: Jamie Mccarthy / Getty Images for alice + olivia
What Adrian R'Mante looked like then: Disney +
What Adrian R'Mante looks like now: What Ty Hodges looked like then: Photo by Ron Galella, Ltd./Ron Galella Collection via Getty Images
What Ty Hodges looks like now: What Aly & AJ looked like then: Frazer Harrison / Getty Images
What Aly & AJ look like now: Santiago Felipe / Getty Images
What Debby Ryan looked like then: David Livingston / Getty Images
What Debby Ryan looks like now: Jeff Kravitz / Getty Images for MTV/ViacomCBS
What Brandon Baker looked like then: Disney +
What Brandon Baker looks like now: What Anneliese van der Pol looked like then: Frazer Harrison / Getty Images
What Anneliese van der Pol looks like now: Jesse Grant / Getty Images for Disney
What Alyson Stoner looked like then: Dimitrios Kambouris / WireImage / Via Getty Images
What Alyson Stoner looks like now: Emma Mcintyre / Getty Images for Alo Yoga
What David Henrie looked like then: Lester Cohen / WireImage / Via Getty Images
What David Henrie looks like now: Rich Polk / Getty Images for Indochino
What Emily Osment looked like then: Jon Kopaloff / FilmMagic / Via Getty Images
What Emily Osment looks like now: Rodin Eckenroth / Getty Images
What Adam Lamberg looked like then: Frederick M. Brown / Getty Images
What Adam Lamberg looks like now: What Danielle Panabaker looked like then: Jean-paul Aussenard / WireImage / Via Getty Images
What Danielle Panabaker looks like now: Joe Scarnici / FilmMagic / Via Getty Images
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