In the flick, Fanning stars opposite fellow festival sweetheart Elizabeth Olsen as one of two lifelong best friends who make a pact to lose their virginity the summer after high school but end up falling for the same street artist boy and find their friendship put to the test.
During Fanning's co-interview for Very Good Girls with Collider.com, she announced her attachment to the film The Last Of Robin Hood, "which is about the last two years of Errol Flynn's life ... I'm doing that, and then I did the Kelly Reichardt movie called Night Moves and then I have a movie that Emma Thompson wrote called Effie."
Photos of Fanning at Sundance are attached in the slideshow. As you'll notice, Fanning has gone back to her blonde roots since her last public outing for The Twilight Saga: Breaking Dawn - Part 2's New York City premiere.