Jake Gyllenhaal  stepped out to support mom Naomi Foner, the screenwriter behind Very Good Girls, at the film's Sundance Film Festival premiere last night. He was joined by brother-in-law Peter Sarsgaard , who's married to Maggie Gyllenhaal  and also stars in the picture. It was an extra busy night for Peter, since he also debuted Lovelace with Amanda Seyfried . Very Good Girls leading lady Dakota Fanning  attended the screening at the Eccles Center theater and later on linked up with her and Peter's costar Elizabeth Olsen at an afterparty. Jake made the rounds with his pal Jenny Lewis. He looked good while doing so — Jake has a new look , with slicked-back hair, for a new project. He's been in Georgia making Prisoners with Hugh Jackman .
We're on the scene, getting reports straight from Sundance — make sure to see all the Sundance Film Festival highlights  so far!
Jake Gyllenhaal  and Naomi Foner posed for photos at the Very Good Girls premiere party in Park City, UT.
Elizabeth Olsen and Dakota Fanning  attended the Very Good Girls premiere party in Park City.
Elizabeth Olsen, Boyd Holbrook, and Dakota Fanning  smiled at the Very Good Girls premiere party in Park City.
Jake Gyllenhaal  spent time on his phone in Park City.
Jake Gyllenhaal  at the Very Good Girls premiere in Park City.
Peter Sarsgaard , Dakota Fanning , Naomi Foner, and Boyd Holbrook smiled on the red carpet in Park City.
Peter Sarsgaard  wore a printed shirt to the premiere.
Naomi Foner and Jake Gyllenhaal  smiled in Park City.
Dakota Fanning  and Boyd Holbrook posed with the cast and crew at the Very Good Girls premiere in Park City.
Dakota Fanning  wore dark lipstick for the premiere in Park City.