Notable Role: Maya Hansen in Iron Man 3 (2013)

Rebecca Hall isn't a new face in the industry. She's that girl whom you've seen in your favorite movies—The Town and Vicky, Cristina, Barcelona—yet can't quite put your finger on. However, with a supporting role in this year's Iron Man 3 and the highly anticipated Johnny Depp-starrer, Transcendence, the underrated British actress is about to become a household name.