Sundance brings out the celebrities and their chic winter gear. We were there to round up the looks — and the latest gossip.

After hitting the slopes, “Entourage” star

Adrian Grenier

hosted a candlelit dinner at a private Deer Valley mansion for his documentary, “52: The Search for the Loneliest Whale in the World,” about a whale whose voice’s pitch is higher than his peers. Grenier talked to The Post about his new modeling gig for Buffalo Jeans: “I don’t think that modeling has been thought of as a spiritual endeavor,” and the craziest fan reaction he’s had since they’ve commenced filming “Entourage: The Movie”: “People are pretty much respectful and excited. And at the end of the day, it doesn’t really matter because the hype of the film and the hype of what we do is just part of the milieu of that is Entourage.” Somehow, the star managed to loop every question back to his whale flick, including how he stays warm at Sundance, for which he responded, “Lots of love — and could you imagine if you didn’t have any friends, like a lonely whale, how cold you might be?”

But Christopher Clark, a senior scientist at Cornell University who was at the Hotel Chantelle-catered party, says all Grenier’s talk of sad whales is bull.

“It’s bad enough as it is without them perpetuating this f–king myth,” says Clark. “It’s not the loneliest whale. All the whales can hear this animal, right?…It’s just a unique voice.”

Funnygirl

Kristen Wiig

’s letter skirt is write on. The actress, who was in town for her film “Nasty Baby,” layers her look with a classic camel coat.

When stars want to escape the Sundance frenzy, there’s only one place to go — up high into the mountains. Brad Pitt and a friend were spotted sipping Moscow mules at the luxury Deer Valley hotel Stein Eriksen Lodge. Also there was a ridiculously young-looking

Sarah Silverman

, who, when approached for an interview at 9 on a Saturday night, responded “F - - k no, I’m tired.” She did manage to share her tip for staying warm at Sundance: “Coats.” Noted.

At the luxurious Montage hotel, a hodgepodge group of celebs dined at the hotel’s restaurant, Burgers & Bourbon, including

Gwyneth Paltrow

and kids, Johnny Knoxville and Keanu Reeves, while the Stone Temple Pilots performed a concert steps away.

Actress

Hailee Steinfeld

covers up her cold shoulders with a pop of periwinkle and gives a warm smile to the cameras.

A Moschino-clad

Frances Bean Cobain

(far left) looks like a punk-rock princess with mom

Courtney Love

.

We talked to “Daily Show” correspondent

Jessica Williams

, who just hours after she touched down in Park City, was already a bona fide Sundance style maven. “My coat game is really strong,” says Williams. “Everything under that is just simple. I’m going with leggings, a drapey black tee, and then I have my ’90s coat, my All Saints coat and my Canada [Goose]. And I’m just rotating.” Williams, who was in town promoting her film “People, Places, Things,” says she loves working with Jon Stewart, specifically for “his old man jokes.”

“He’s supersmart, and I’m always learning.”

Lena Dunham

(right, with pal

Brie Larson

) might have let it slip that she was engaged, or even married, to rock star boyfriend Jack Antonoff at a Planned Parenthood party. During a speech, she casually referred to her bae’s sister, Rachel Antonoff, as her “sister-in-law.” Lena shrugged it off, posed for pics with fans afterwards, and even doled out her assistant’s Gmail address so they could contact her.

After posing for one photo, Lena ran over to a pal and said: “Someone came up to me and was like, ‘Make a black-power face.’ And I did it. And I loved it! But I was like, this is definitely going to hurt me.”

Alec Baldwin

may not be a fan of The Post, but he sure charmed the pants off the staffers at the Stein Eriksen Lodge, where he and his preggers wife,

Hilaria

, shacked up for a week with their baby,

Carmen

(all pictured above).

“He was on a first-name basis with everyone” says a source, who adds that Baldwin purchased some fresh poles, a hat and goggles before heading out to the slopes.

It’s Aussie stunner

Margot Robbie

fur the win in two-tone denim, violet kicks and a dreamy, creamy topper.

Did Pharrell lose his hat?

Erykah Badu

and

Common

attend “A Celebration of Music in Film” at Sundance.

Capes off to you,

Brooklyn Decker

! The actress has plaid love for tartan at a Grey Goose Blue Door cast party.

Meryl Streep’s actress daughter

Mamie Gummer

is getting into the moviemaking business and launching her own production company called Lampshade, with childhood friend New Yorker Emily Jerome. Mamie shacked up with Sting’s daughter Mickey Sumner and Jerome in Park City last week to premiere Gummer and Sumner’s Sundance film, “The End of the Tour.” Lampshade will look to support independent productions.

James Franco

is snow stylish in this Fair Isle sweater at the premiere of his flick “I Am Michael.”

While the pricey cocktails at Stein Eriksen Lodge are up to snuff for even the most famous of celebs, the hulking

Jason Mamoa

, from “Game of Thrones,” decided to take drinking matters into his own hands, rolling into the Deer Valley establishment with “cases of beer,” according to a source.

Jack Black

looks doggone cool in a Husky tee. “The D Train” star was spotted serenading Sundancers from a balcony.

Nicole Kidman

doesn’t do snow-wear chic. She just does chic. The elegant actress was spotted with a Céline tote and fitted polka-dot sweater.