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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 InStyle.com 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!

MORE SUNDANCE: 
• Inside InStyle’s Sundance Studio
• Naomi Watts’s Effortless Lip Look
• Plus, See Inside Sundance Parties

— Meghan Blalock, with reporting by Karen Levy

Dakota Fanning and Coco Rocha are lightening up this winter! After a brief stint as a brunette in the fall, Fanning went back to her blond roots to start the year. Also, model Coco Rocha swapped her auburn hue for ombre highlights. Rocha dabbled in the two-tone hair trend back in May when she used pink extensions at the Met Gala, but unveiled a more permanent version yesterday. What do you think of their new looks? Tell us in the comments!

Plus, see more hair makeovers of 2013.

MORE:
• Try on Coco Rocha’s Chic Top Knot!
• Herbal Essences Relaunches ’90s Shampoos
• See Dakota Fanning’s Hairstyles — On You

Dakota Fanning showed off her summer style in a Topshop swan-print skirt and matching cut-out top while out and about in Los Angeles this week. While her cropped tank has sold out, we think her swingy mini would look equally great with a simple white blouse. Score the style for $68 at topshop.com.

Plus, shop summer trends under $50!