42. Olivia Wilde
Biggest accomplishment this year: Starring in forthcoming movies from acclaimed directors Ron Howard (Rush) and Spike Jonze (Her)
It's been a big 2013 already for Wilde, who has already appeared in The Incredible Burt Wonderstone and has at least six other projects either completed or close to it including the festival hit Drinking Buddies and Third Person, a huge ensemble film starring James Franco, Mila Kunis, Liam Neeson, Adrien Brody, Maria Bello, Kim Basinger, and Casey Affleck. Wilde also has had a big year personally, announcing via Twitter in January that she and Saturday Night Live star Jason Sudeikis are now engaged. The 29-year-old also continues to endorse Revlon products, appearing on the pages of pretty much every major magazine sporting their lipstick and makeup. Not that she even needs it.