3. ROSE BYRNE

Rose Byrne creeps up on you. No, not in the horrific way that the evil spirits in her ridiculously creepy hit film Insidious did earlier this year. It's more like the way her character Moira MacTaggert inserted herself into Charles Xavier's life in X-Men: First Class, i.e. more like you don't realize you're watching her until she subtly burrows herself in your heart. Take Bridesmaids, for instance, in which she played the rich, begrudgingly overachieving foil to Kristen Wiig's character. You hate her throughout the first half of the movie, but then you walk out of the theater with the urge to Google her. We're willing to be that Byrne has become become a favorite amongst film execs.