#1 Joseph Gordon-Levitt
JGL was one of our favorite cool guys back in 1996. With a main role on the sitcom 3rd Rock From the Sun, we got to see him at the beginning of his transition from child actor to teenage heartthrob. When the show ended, he stepped out of the spotlight to attend Columbia University only to drop out in 2004 to reemerge as a film actor. With hit roles in movies like 500 Days of Summer and Inception and success in writing and directing, the future is bright for this handsome triple threat.