Age: 28
Notable role: Lisbeth Salander in The Girl With the Dragon Tattoo (2011)

Rooney Mara catches a lot of flak for her social awkwardness. She's not a smiler. She oftentimes wears a far-off gaze, like she's thinking about poetry. And it's precisely that air of introspection that brings such intensity to her roles. Case in point: her Oscar-nominated role as the sociopathic hacker Lisbeth Salander in David Fincher's The Girl With the Dragon Tattoo.

Mara is best described as a quiet storm. Her latest efforts, Steven Soderburgh's last theatrical release Side Effects and the Cannes selection Ain't Them Bodies Saints, have proven that while she's not the most outspoken actress on the red carpet, all you need to do is watch her on screen to understand her appeal.