76. Gemma Arterton
Biggest accomplishment this year: Starring in the international box office success Hansel & Gretel: Witch Hunters
After starting off 2013 with a top-billed performer in the dud Hansel and Gretel: Witch Hunters, Arterton will look to rebound with a couple of highly-anticipated releases later this year. She'll play a key role in September's Runner, Runner, which stars Justin Timberlake as a college student who goes broke playing online poker but is mentored by the site's owner, played by Ben Affleck. She also stars in Byzantium, a vampire-themed thriller in which Arterton plays a mother vampire on the run with her daughter. Given the fact that director Neil Jordan already has an Academy Award nomination for another vampire movie, this one has a higher probability of being successful than Arterton's previous on-screen efforts.