1. Eminem is 50 Jeff Kravitz / FilmMagic / Getty Images
And here he is at the beginning of his career: Kevin Winter / Getty Images
Steve Granitz / FilmMagic / Getty Images
And here she is at the beginning of her career: Brian Zak / Gamma-Rapho via Getty Images
3. Mark Hoppus is 50 Leon Bennett / Getty Images
And here he is at the beginning of his career: Michael Ochs Archives / Getty Images
Icon Sportswire / Icon Sportswire via Getty Images
And here she is at the beginning of her career: Tim Roney / Getty Images
Rodin Eckenroth / The Hollywood Reporter via Getty Images
And here he is at the beginning of his career: Nbc / NBCUniversal via Getty Images
And here he is at the beginning of his career: Picture Alliance / picture alliance via Getty Images
7. Howie D. is the next oldest Backstreet member at 50 And here he is at the beginning of his career: L. Busacca / WireImage / Getty Images
And here he is at the beginning of his career: Michael Ochs Archives / Getty Images
9. Gabrielle Union is 50 Monica Schipper / Getty Images
And here she is at the beginning of her career: J. Vespa / WireImage / Getty Images
10. Alfonso Ribeiro is 52 James Clark / ABC via Getty Images
And here he is at the beginning of his career: Nbc / NBCUniversal via Getty Images
11. Juliette Lewis is 50 Nbc / Weiss Eubanks / NBCUniversal via Getty Images
And here she is at the beginning of her career: Abc Photo Archives / Disney General Entertainment Content via Getty Images
12. Lil Jon is 52 Gregg Deguire / Getty Images
And here he is at the beginning of his career: Stephen Lovekin / FilmMagic / Getty Images
13. Johnny Knoxville is 52 Jeff Kravitz / FilmMagic / Getty Images
And here he is at the beginning of his career: Annie Wells / Los Angeles Times via Getty Images
14. Jim Parsons is 50 Bruce Glikas / Bruce Glikas / WireImage
And here he is at the beginning of his career: Cbs Photo Archive / CBS via Getty Images
15. Snoop Dogg is 51 Alexander Tamargo / Getty Images for E11EVEN
And here he is at the beginning of his career: Raymond Boyd / Getty Images
16. Jenny McCarthy is 50 Jose Perez / GC Images / Getty Images
And here she is at the beginning of her career: Ron Galella / Ron Galella Collection via Getty Images
17. Mario Lopez turns 50 next month Robin L Marshall / Getty Images
And here he is at the beginning of his career: Nbc / NBCUniversal via Getty Images
18. Marlon Wayans is 51 Stefanie Keenan / WireImage / Getty Images
And here he is at the beginning of his career: Jeff Kravitz / FilmMagic, Inc / Getty Images
19. Billie Joe Armstrong is 51 Tim Mosenfelder / WireImage / Getty Images
And here he is at the beginning of his career: Robert Knight Archive / Redferns / Getty Images
20. Adam Scott is 50 Frederic J. Brown / AFP via Getty Images
And here he is at the beginning of his career: Kurt Krieger - Corbis / Corbis via Getty Images
21. Ben Affleck is 51 Albert L. Ortega / Getty Images
And here he is at the beginning of his career: Ron Davis / Getty Images
22. Shaq is 51 Kimberly White / Getty Images for TechCrunch
And here he is at the beginning of his career: Scott Cunningham / NBAE via Getty Images
23. Kate Beckinsale is 50 Dominik Bindl / Getty Images
And here she is at the beginning of her career: Keith Hamshere / Getty Images
24. Cameron Diaz is 51 Ricky Vigil M / GC Images / Getty Images
And here she is at the beginning of her career: Eric Robert / Sygma via Getty Images
25. Dwayne Johnson is 51 Jeff Kravitz / FilmMagic / Getty Images
And here he is at the beginning of his career: Frank Micelotta Archive / Getty Images
26. Neil Patrick Harris is 50 Matt Miller / ABC via Getty Images
And here he is at the beginning of his career: Nancy R. Schiff / Getty Images
27. Brendan Fraser is 53 Daniele Venturelli / Getty Images
And here he is at the beginning of his career: Steve Granitz / WireImage / Getty Images
28. Neve Campbell turns 50 next week Sonia Recchia / WireImage / Getty Images
And here she is at the beginning of her career: Ron Davis / Getty Images
29. Jack McBrayer is 50 Rodin Eckenroth / Getty Images
And here he is at the beginning of his career: Patrick Mcmullan / Patrick McMullan via Getty Images
30. Nick Lachey is 49 Roy Rochlin / Getty Images for Netflix
And here he is at the beginning of his career: Tim Roney / Getty Images
31. Pharrell Williams is 49 Edward Berthelot / Getty Images
And here he is at the beginning of his career: Christina Radish / Redferns / Getty Images
32. Carmen Electra is 51 Axelle / FilmMagic / Getty Images
And here she is at the beginning of her career: Ron Galella / Ron Galella Collection via Getty Images
33. Winona Ryder is 51 Roy Rochlin / Getty Images
And here she is at the beginning of her career: Aaron Rapoport / Getty Images
34. Jay-Z is 53 Kevin Mazur / Getty Images for Roc Nation
And here he is at the beginning of his career: Al Pereira / Getty Images
35. Ricky Martin is 51 Starlite / Redferns / Getty Images
And here he is at the beginning of his career: Getty Images
36. Omar Epps is 50 Bravo / Charles Sykes/Bravo via Getty Images
And here he is at the beginning of his career: Nbc / NBCU Photo Bank / NBCUniversal via Getty Images
37. Idris Elba is 51 Dave Benett / Dave Benett / Getty Images for Apple TV+
And here he is at the beginning of his career: Lawrence Lucier / Getty Images
38. Lil Kim is 49 Kaitlyn Morris / FilmMagic / Getty Images
And here she is at the beginning of her career: Jim Smeal / Ron Galella Collection via Getty Images
39. Lucy Liu is 54 Bryan Bedder / Getty Images for UNZIPPED: An Autopsy of American Inequality
And here she is at the beginning of her career: Cbs Photo Archive / CBS via Getty Images
40. Elizabeth Berkley is 51 Fox / FOX Image Collection via Getty Images
And here she is at the beginning of her career: Nbc / NBCUniversal via Getty Images
41. Chilli from TLC is 52 Ethan Miller / Getty Images
And here she is at the beginning of her career: Al Pereira / Getty Images
42. Tori Spelling is 50 Andrew J Cunningham / Getty Images
And here she is at the beginning of her career: Gregory Bojorquez / Getty Images
43. Rob Thomas is 51 Jeremychanphotography / Getty Images
And here he is at the beginning of his career: Jeff Kravitz / FilmMagic, Inc / Getty Images
44. James Marsden is 50 Paul Morigi / Getty Images
And here he is at the beginning of his career: Christopher Polk / FilmMagic / Getty Images
45. Carson Daly is 50 Nbc / Nathan Congleton / NBC via Getty Images
And here he is at the beginning of his career: Jeff Kravitz / FilmMagic, Inc / Getty Images
46. Brian Austin Green is 50 Kevin Winter / Getty Images
And here he is at the beginning of his career: Ron Galella / Ron Galella Collection via Getty Images
47. Sean Paul is 50 Astrida Valigorsky / WireImage / Getty Images
And here he is at the beginning of his career: Theo Wargo / WireImage / Getty Images
48. Gwyneth Paltrow is 50 Steve Granitz / FilmMagic / Getty Images
And here she is at the beginning of her career: Nbc / NBCUniversal via Getty Images
49. Monica Lewinsky is 50 Karwai Tang / WireImage / Getty Images
And here she at the beginning of her career: Dod / Getty Images
50. Gwen Stefani is 53 GC Images / Getty Images
And here she is at the beginning of her career: Barry King / WireImage / Getty Images
51. Tony Hawk is 55 Sean M. Haffey / Getty Images
And here he is at the beginning of his career: Marcel Noecker / Sygma via Getty Images
52. Maya Rudolph is 51 Randy Shropshire / Deadline via Getty Images
And here she is at the beginning of her career: Nbc / NBCUniversal via Getty Images
53. Busta Rhymes is 51 Kevin Mazur / Getty Images for Global Citizen
And here he is at the beginning of his career: David Corio / Getty Images
54. Jennifer Lopez is 54 Dave Benett / Jed Cullen/Dave Benett / Getty Images
And here she is at the beginning of her career: David Lefranc / Sygma via Getty Images
55. Paul Rudd is 54 Kyle Rivas / Getty Images
And here he is at the beginning of his career: Cbs Photo Archive / CBS via Getty Images
56. And last but not least, Keanu Reeves is 59 Rodin Eckenroth / Getty Images for ABA
And here he is at the beginning of his career: Aaron Rapoport / Getty Images
