1. Prince William now:
Prince William when he was 18:
Justin Timberlake when he was 18:
Christina Aguilera when she was 18:
Zac Efron when he was 18:
Britney Spears when she was 18:
6. Miley Cyrus now:
Miley Cyrus when she was 18:
7. Jennifer Lawrence now:
Jennifer Lawrence when she was 18:
8. Jennifer Aniston now:
Jennifer Aniston when she was 18:
9. Leonardo DiCaprio now:
Leonardo DiCaprio when he was 18:
10. Reese Witherspoon now:
Reese Witherspoon when she was 18:
11. Sarah Jessica Parker now:
Sarah Jessica Parker when she was 18:
12. Tom Cruise now:
Tom Cruise when he was 18:
13. Will Smith now:
Will Smith when he was 18:
14. David Beckham now:
David Beckham when he was 18:
15. Jake Gyllenhaal now:
Jake Gyllenhaal when he was 18:
16. Tyra Banks now:
Tyra Banks when she was 18:
17. Cher now:
Cher when she was 18:
18. Freddie Prinze Jr. now:
Freddie Prinze Jr. when he was 19 (close enough though):
19. Sarah Michelle Gellar now:
Sarah Michelle Gellar when she was 18:
20. Blake Lively now:
Blake Lively when she was 18:
21. Prince Harry now:
Prince Harry when he was 18:
22. LeBron James now:
LeBron James when he was 18:
23. Selena Gomez now:
Selena Gomez when she was 18:
24. Justin Bieber now:
Justin Bieber when he was 18:
25. Taylor Swift now:
Taylor Swift when she was 18:
26. Ariana Grande now:
Ariana Grande when she was 18:
27. Beyoncé now:
Beyoncé when she was 18:
28. Rihanna now:
Rihanna when she was 18:
29. Paris Hilton now:
Paris Hilton when she was 18:
30. Nicole Richie now:
Nicole Richie when she was 18:
31. Hilary Duff now:
Hilary Duff when she was 18:
32. Lindsay Lohan now:
Lindsay Lohan when she was 18:
33. Ashley Tisdale now:
Ashley Tisdale when she was 18:
34. Nick Jonas now:
Nick Jonas when he was 18:
35. Joe Jonas now:
Joe Jonas when he was 18:
36. Mandy Moore now:
Mandy Moore when she was 18:
37. Scarlett Johansson now:
Scarlett Johansson when she was 18:
38. Anne Hathaway now:
Anne Hathaway when she was 18:
39. Emma Stone now:
Emma Stone when she was 18:
40. Michael B. Jordan now:
Michael B. Jordan when he was 18:
41. Avril Lavigne now:
Avril Lavigne when she was 18:
42. Neil Patrick Harris now:
Neil Patrick Harris when he was 18:
43. Madonna now:
Madonna when she was 18:
