Rooney Mara came practically out of nowhere to emerge as one of the most sought-after actresses these days, thanks in large part to her awesome portrayal of Lisbeth Salander in The Girl With The Dragon Tattoo.

Now she's starring in a slightly lower-profile project Ain't Them Bodies Saints, starring opposite Casey Affleck as an outlaw. Hollywire's Chelsea Briggs chatted with the stunning starlet at Sundance — find out more after the jump!