1. Matt Dallas from Kyle XY then: Albert L. Ortega / WireImage
Matt Dallas now: David Livingston / Getty Images
2. Michael Angarano from Sky High then: Jesse Grant / WireImage
Michael Angarano now: Jon Kopaloff / Getty Images
3. Emily VanCamp from Everwood then: Kurt Krieger - Corbis / Corbis via Getty Images
Emily VanCamp now: Frazer Harrison / Getty Images
4. Max Thieriot from Catch That Kid then: Barry King / WireImage
Max Thieriot now: Rich Fury / Getty Images
5. James Lafferty from One Tree Hill then: Kevin Winter / Getty Images
James Lafferty now: Gregg Deguire / Getty Images
6. Lil' Romeo then: Theo Wargo / WireImage
Lil' Romeo/Romeo Miller now: Paras Griffin / Getty Images for Essence
7. Bryan Greenberg from One Tree Hill then: Steve Granitz / WireImage
Bryan Greenberg now: Amy Sussman / Getty Images
8. William Moseley from The Chronicles of Narnia then: Shawn Ehlers / WireImage
William Moseley now: Jamie Mccarthy / Getty Images for Tribeca Festival
9. Sean Faris from Life As We Know It then: Frank Trapper / Corbis via Getty Images
Sean Faris now: Gp / GC Images
10. Gregory Smith from Everwood then: Jeffrey Mayer / WireImage
Gregory Smith now: 11. Tom Welling from Smallville then: Evan Agostini / Getty Images
Tom Welling now: Stefanie Keenan / Getty Images for A Sense of Home
12. Leighton Meester from Gossip Girl then: Jean-paul Aussenard / WireImage
Leighton Meester now: Michael Kovac / Getty Images for Lionsgate
13. Jeremy Sumpter from Peter Pan then: Jon Kopaloff / FilmMagic
Jeremy Sumpter now: Chelsea Guglielmino / Getty Images
14. Tyler James Williams from Everybody Hates Chris then: Michael Caulfield Archive / WireImage for The WB Television Network
Tyler James Williams now: Arturo Holmes / WireImage
15. Adam Brody from The O.C. then: J. Merritt / FilmMagic
Adam Brody now: Alberto E. Rodriguez / WireImage
16. Ben McKenzie from The O.C. then: J. Merritt / FilmMagic
Ben McKenzie now: Jamie Mccarthy / Getty Images for National Board of Review
17. Robert Ri'chard from Cousin Skeeter then: J. Vespa / WireImage
Robert Ri'chard now: Paul Archuleta / Getty Images
18. Mischa Barton from The O.C. then: Kmazur / WireImage
Mischa Barton now: Paul_archuleta / Getty Images
19. Jonathan Bennett from Mean Girls then: Jean-paul Aussenard / WireImage
Jonathan Bennett now: Stefanie Keenan / Getty Images for GLAAD
20. Chris Carmack from The O.C. then: Gregg Deguire / WireImage
Chris Carmack now: Jon Kopaloff / Getty Images
21. Raven-Symoné from That's So Raven then: Steve Granitz / WireImage
Raven-Symoné now: Paul Archuleta / Getty Images
22. A. J. Trauth from Even Stevens then: Gregg Deguire / WireImage
A. J. Trauth now: 23. Mike Erwin from Everwood then: Frank Micelotta / Getty Images
Mike Erwin now: 24. Alexa PenaVega from Spy Kids then: Carlo Allegri / Getty Images
Alexa PenaVega now: Paul Archuleta / Getty Images
25. Bow Wow then: Steve Granitz / WireImage
Bow Wow/Shad Moss now: Marcus Ingram / Getty Images
26. Chad Michael Murray from One Tree Hill then: Jeffrey Mayer / WireImage
Chad Michael Murray now: Paul Archuleta / Getty Images
27. Cam Gigandet from The O.C. then: Denise Truscello / WireImage
Cam Gigandet now: Nicole Kubelka / Nicole Kubelka/Geisler-Fotopress/picture-alliance/dpa / AP Images
28. Corbin Bleu from High School Musical then: New York Daily News Archive / NY Daily News via Getty Images
Corbin Bleu now: Momodu Mansaray / Getty Images
29. Brandon Routh from Superman then: Steve Granitz / WireImage
Brandon Routh now: Roy Rochlin / Getty Images
30. Tessa Thompson from Veronica Mars then: Jeffrey Mayer / WireImage
Tessa Thompson now: Samir Hussein / Samir Hussein/WireImage
31. Brittany Snow from American Dreams then: Albert L. Ortega / WireImage
Brittany Snow now: Frazer Harrison / Getty Images
32. Evan Rachel Wood from Once and Again then: Steve Granitz / WireImage
Evan Rachel Wood now: Albert L. Ortega / Getty Images
33. Kyla Pratt from One on One then: Steve Granitz / WireImage
Kyla Pratt now: Unique Nicole / WireImage
34. Justin Berfield from Malcom in the Middle then: Jim Spellman / WireImage
Justin Berfield now: 35. Jon Abrahams from Scary Movie then: Jon Kopaloff / FilmMagic
Jon Abrahams now: 36. Samaire Armstrong from The O.C. then: Jesse Grant / WireImage
Samaire Armstrong now: Albert L. Ortega / Getty Images
37. And finally, Taylor Handley aka Oliver from The O.C. then: Gregg Deguire / WireImage
Taylor Handley now: Alberto E. Rodriguez
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