By InStyle Staff
Updated Jan 23, 2013 @ 12:13 pm
Credit: Michael Loccisano/Getty

Elizabeth Olsen and Dakota Fanning celebrated the premiere of their film Very Good Girls at the Sundance Film Festival with an after-party hosted by The Mint Agency, The Branding Be, and Simple Night at the Nur Khan Presents NK pop-up in Park City, Utah. In the film, Fanning (in Louis Vuitton) and Olsen play best friends who take a risky pact during the summer following their senior year—only to have their friendship tested in a big way. "I've known Lizze for a while," Fanning told when she dropped by our portrait studio earlier that day. "We really, truly love each other and are close."

Plus, see more big stars at Sundance!

Meghan Blalock, with reporting by Karen Levy