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Portia Doubleday

Where to see her: "Youth in Revolt" What she's done: Aside from a lead role in the yet-to-be-released indie film "18," this is Doubleday's first major film. What she's playing: Doubleday follows "it" girls such as Ellen Page and Kat Dennings as the object of Michael Cera's affection in this...

Bruce Birmelin / Dimension Films