55. Jessica Paré
Biggest accomplishment this year: Returning as a series regular for the sixth season of AMC's Mad Men
Jessica Paré launched to stardom last year with her stunning performance of "Zou Bisou Bisou" in the opening episode of season five of Mad Men and since then has become a fan favorite as the already-suffering wife of the philandering Don Draper. She just finished shooting a role in the romantic comedy Standby, in which she plays a woman stranded at an airport and forced to stay at her ex's house. Will they reconnect? We'll let you figure that one out. Paré has also done some work in the fashion world, appearing on the April 2013 cover of L.A. Confidential's annual spring fashion magazine.