Naomi Watts Jessica Biel & Rooney Mara Pictures At Sundance

The Sundance Film Festival has kicked off with a stylish start as celebrities gather in Park City, Utah to showcase their latest projects. With the freezing cold temperatures in mind, celebs have skipped their usual dress routine for something cozier — and just as cool. Naomi Watts showed off her Winter weather style at the Two Mothers premiere in leather leggings and Isabel Marant kicks, Jessica Biel made her rounds at the premiere of Emanuel and the Truth About Fishes in a chic and casual oatmeal sweater and black skinnies, while Keri Russell emoted a look that's nothing short of rustic cool at the Austenland kick-off. Click on to see more stylish celeb appearances at Sundance right now and come back often for updates!