Carey Mulligan
Boy do the three drama schools that rejected Carey Mulligan have egg on their faces now. Luckily, the plucky pretty young thing was persistent in her pursuit of the stage and screen and started with school productions including one that starred her brother Owen. When "Downton Abbey" creator Julian Fellows spoke at her school, she convinced the headmistress to introduce them and Fellowes must have liked what he saw in her as he introduced her to a casting agent. She made her film debut in 2005 as Kitty Bennett opposite Keira Knightly in "Pride & Prejudice" and starred in several