19. Joseph Gordon-Levitt
Not only did Joseph Gordon-Levitt go from having one of the most unexpected career turnarounds in recent history (From 3rd Rock from the Sun to The Dark Knight Rises. Cotdamn!) but 2012 was the year he went from the lame twee guy we associated with 500 Days of Summer to a certified A-lister who kills it in any suit he touches. Who knows if Gordon-Levitt will be the next Bruce Wayne, but he's certainly dressing like he wants the part.