Stars Bundle Up in Style at the 2017 Sundance Film Festival

Dianna Agron in an embellished navy dress at the Novitate premiere.

Kristen Stewart in a leather jacket and ripped jeans by Mother Denim at the Come Swim premiere.

Jaime King in a black-and-white look at the IMDb Studio. 

Alison Brie in a navy turtleneck dress at The Little Hours premiere.

Teresa Palmer in a brocade dress at the IMDb Studio. 

Aubrey Plaza in Victoria Beckham at The Little Hours premiere.

Zoey Deutch in a white trench coat, black pants, and Sorel boots ($97; sorel.com) at the IMDb Studio.

Lily Collins showed her stripes in a cozy cable-knit Faithfull The Brand turtleneck sweater ($85; faithfullthebrand.com) at the To the Bone premiere. Black skinny jeans and Sorel snow boots ($150; sorel.com) completed the cute-but-practical ensemble. 

Starlet Margaret Qualley went Annie Hall in a striped, untucked Sandro blouse topped off with a gray blazer. She's also clearly dominating the snow-appropriate footwear game in those utility boots. 

The Atlanta actor's fur. Enough said. 

Tall boots and a long jacket were Carey Mulligan's M.O. this weekend—and we are into it. 

Nicholas Hoult does guy style right as he steps out in (almost) all black, with a close-fitting (not slouchy) knit beanie for good measure. 

The actress looked cool (and warm) in a tie-front sweater, slouchy pants, and military boots. She pulled the otherwise all-black look together with an olive-colored overcoat. 

The R&B queen was also about the tie-front sweater, which she wore with leather pants and those hoops for a cozy-meets-sexy apres-ski look. 

Like a true Olsen, Lizzie does kimono dressing with enviable panaché in this floral number. 

St. Vincent in a plush multicolor coat at the XX premiere.

Jenny Slate in a black off-the-shoulder dress at The Polka King premiere.

Laura Dern in a red tee and orange culottes at the Wilson premiere.

Brittany Snow in a green Gap coat and black Tory Burch turtleneck at the To The Bone premiere party.

Chloë Sevigny in a brown coat and printed dress at the Golden Exits premiere.

Zoey Deutch in a navy pantsuit at the Creators League Studio.

America Ferrera in a striped top and blazer at AT&T At The Lift.

John Legend in a black beanie and double-breasted blazer at the Underground Season 2 party.

Elizabeth Olsen in a black tee, light-wash jeans, and snowboots at the IMDb Studio.

Jaime King in a denim jumpsuit and plush Tory Burch coat in the Acura Studio.

Laura Prepon in a gray turtleneck, black coat, and Frye boots at the The Hero premiere on day 3 of the 2017 Sundance Film Festival at Library Center Theater.

Olivia Culpo in a white Aritzia sweater, black Mackage parka, and over-the-knee boots in the IMDb Studio.

Jon Hamm bundles up in a scarf and jeans at the Marjorie Prime premiere.

Connie Britton in a navy coat at the Beatriz at Dinner premiere.

Salma Hayek in a trimmed button-up and black pants at the Beatriz at Dinner premiere.

Kathryn Hahn in a red pantsuit at the I Love Dick premiere.

Elle Fanning in a pink coat and blue tie blouse at the Lunch Celebrating Films Powered by Women.

 Zoey Deutch in a black mini with keyhole cutout at the Rebel in the Rye premiere.

Serayah in midnight blue velvet pants, a black turtleneck, and a furry blue coat at the Burning Sands premiere.

Hannah Simone in an off-the-shoulder black dress at the attends the Band Aid premiere.

Brooklyn Decker in a plush white coat and ankle-length trousers at the Band Aid premiere.

Alfre Woodard in a midi-length orange tunic at the Burning Sands premiere.

Salma Hayek in a double-breasted houndstooth coat at the Lunch Celebrating Films Powered by Women.

Aubrey Plaza in a green coat at the Ingrid Goes West premiere.

Elle Fanning in a black pantsuit and tie blouse at the Sidney Hall premiere.

Michelle Monaghan in Louis Vuitton at the Sidney Hall premiere.