Pictures of Celebrities at the 2013 Sundance Film Festival

The Sundance Film Festival has kicked off with a stylish start as celebrities gather in Park City, UT, to showcase their latest projects. With the freezing-cold temperatures in mind, celebs have skipped their usual dress routine for something cosier — and just as cool. Naomi Watts showed off her Winter style at the Two Mothers premiere in leather leggings and Isabel Marant wedges, only to switch into yet another pair of pumped-up kicks later in the day. Jessica Biel made the rounds at the premiere of Emanuel and the Truth About Fishes in an oatmeal sweater and black skinnies, slipping into something equally chic and casual (beanie included) post-red carpet. Meanwhile Keri Russell and Shailene Woodley both turned out looks that were nothing short of rustic cool, thanks to cable-knit staples, vintage-inspired denim, and lace-up boots. Click on to see even more of Sundance's most stylish celeb appearances — and come back often for updates! — Additional reporting by Marisa Tom