Sundance Film Festival 2012

There's a lot of air kissing going on these days in Park Citry, Utah, where celebrities have gathered for the annual Sundance Film Festival. Here, musician Tommy Lee, left, greets another guest at a a party on Jan. 23, 2012.

Keep clicking to see which other stars have traded their red-carpet formals for the ski resort's sweaters and mittens.

Actor Andy Samberg and actress Rashida Jones pose for a portrait during the 2012 Sundance Film Festival at the Getty Images Portrait Studio at T-Mobile Village at the Lift on Jan. 20, 2012, in Park City, Utah.

John Shearer/Getty Images for Best Events

Actress Emma Roberts attends day 1 of the T-Mobile Google Music Village at The Lift on Jan. 20, 2012, in Park City, Utah.

Actress Elizabeth Olsen arrives at "Red Lights" premiere during the 2012 Sundance Film Festival on Jan. 20, 2012, in Park City, Utah.

Jamie McCarthy/Getty Images for Grey Goose

Actress Rashida Jones and her father producer Quincy Jones attend "Celeste And Jesse Forever" after-party at Grey Goose Blue Door on Jan. 20, 2012, in Park City, Utah.

Writer/director Lynn Shelton, actor Mark Duplass, actress Emily Blunt and actress Rosemarie DeWitt pose for a portrait during the 2012 Sundance Film Festival at the Getty Images Portrait Studio at T-Mobile Village at the Lift on Jan. 21, 2012, in Park City, Utah.

Actress Liv Tyler and actor James Marsden pose for a portrait during the 2012 Sundance Film Festival at the Getty Images Portrait Studio at T-Mobile Village at the Lift on Jan. 21, 2012, in Park City, Utah.

Actors Jay Paulson, Lake Bell, Will Bouvier, Anslem Richardson, director and actor Katie Aselton and Kate Bosworth pose for a portrait during the 2012 Sundance Film Festival at the Getty Images Portrait Studio at T-Mobile Village at the Lift on Jan. 21, 2012, in Park City, Utah.

Actors Geoffrey Arend, Alison Brie, Mark Webber, Lizzy Caplan, Martin Starr and writer/director Michael Mohan pose for a portrait during the 2012 Sundance Film Festival at the Getty Images Portrait Studio at T-Mobile Village at the Lift on Jan. 21, 2012, in Park City, Utah.

Dimitrios Kambouris/Getty Images for Best Events

Actor Jesse Williams attends Day 2 of T-Mobile Google Music Village at The Lift on Jan. 21, 2012, in Park City, Utah.

Actress Liv Tyler attends the Stella Cafe At T-Mobile Google Music Village At The Lift - Day 2 - during the Sundance Film Festival on Jan. 21, 2012, in Park City, Utah.

Actor Cillian Murphy, director/writer Rodrigo Cortes and actress Sigourney Weaver pose for a portrait during the 2012 Sundance Film Festival at the Getty Images Portrait Studio at T-Mobile Village at the Lift on Jan. 21, 2012, in Park City, Utah.

Actor Michael Cera poses for a portrait during the 2012 Sundance Film Festival at the Getty Images Portrait Studio at T-Mobile Village at the Lift on Jan. 21, 2012, in Park City, Utah.

Actress Traci Lords, writer/director Richard Bates Jr. and actress AnnaLynne McCord pose for a portrait during the 2012 Sundance Film Festival at the Getty Images Portrait Studio at T-Mobile Village at the Lift on Jan. 21, 2012, in Park City, Utah.

Actresses Lake Bell, left, and Kate Bosworth attend the "Black Rock" premiere during the 2012 Sundance Film Festival held at Library Center Theater on Jan. 21, 2012, in Park City, Utah.

From left to right, actors Bruce Willis,Corbin Bernsen, Laura Prepon, Rebecca Hall and Joshua Jackson attend the "Lay the Favorite" premiere during the 2012 Sundance Film Festival held at Eccles Center Theatre on Jan. 21, 2012, in Park City, Utah.

Actor Nolan Gould attends Day 1 of The Variety Studio at The 2012 Sundance Film Festival at Variety Studio on Jan. 21, 2012, in Park City, Utah.

From left to right, writer Sarah Koskoff, actress Blythe Danner and actress Melanie Lynskey speak at Day 1 of The Variety Studio at The 2012 Sundance Film Festival at Variety Studio on Jan. 21, 2012, in Park City, Utah.

Actors Lizzy Caplan, Kirsten Dunst, Isla Fisher and James Marsden pose for a portrait during the 2012 Sundance Film Festival at the Getty Images Portrait Studio at T-Mobile Village at the Lift on Jan. 22, 2012, in Park City, Utah.

From left to right, actress Octavia Spencer, actor Aaron Paul, actress Mary Elizabeth Winstead, writer/director James Ponsoldt, actor Nick Offerman and actress Megan Mullally attend Day 2 of the Variety Studio during the 2012 Sundance Film Festival held at Variety Studio At Sundance on Jan. 22, 2012, in Park City, Utah.

Nicole "Coco" Austin and filmmaker Ice-T attend Day 2 of the Variety Studio during the 2012 Sundance Film Festival held at Variety Studio At Sundance on Jan. 22, 2012, in Park City, Utah.

Actor Nick Offerman and actress Megan Mullally attend Day 2 of the Variety Studio during the 2012 Sundance Film Festival held at Variety Studio At Sundance on Jan. 22, 2012, in Park City, Utah.

Actor Steve Little, actor William Fichtner, actress Alexis Dziena, writer/director Quentin Dupieux, actor Jack Plotnick and actor Eric Judor pose for a portrait during the 2012 Sundance Film Festival at the Getty Images Portrait Studio at T-Mobile Village at the Lift on Jan. 22, 2012, in Park City, Utah.

From left to right, actors Paul Dano, So Yong Kim and Joe Heder speak during Day 2 of the Variety Studio during the 2012 Sundance Film Festival held at Variety Studio At Sundance on Jan. 22, 2012, in Park City, Utah.

Actor Aaron Paul, director/writer James Ponsoldt, producer Jonathan Schwartz, actor Nick Offerman, actresses Mary Elizabeth Winstead, Octavia Spencer, Megan Mullally and producers Andrea Sperling and Jennifer Cochis pose for a portrait during the 2012 Sundance Film Festival at the Getty Images Portrait Studio at T-Mobile Village at the Lift on Jan. 22, 2012, in Park City, Utah.

Actress Nia Vardalos attends the "For A Good Time, Call..." premiere during the 2012 Sundance Film Festival held at Eccles Center Theatre on Jan. 22, 2012, in Park City, Utah.

Actresses Allison Janney and Elizabeteh Olsen attend Sheets Energy presents BCDF Sundance Cocktail Party at Stella Artois by Ally B during the 2012 Sundance Film Festival on Jan. 22, 2012, in Park City, Utah.

Frazer Harrison/Getty Images for Stella Cafe

Actresses AnnaLynne McCord, left, and Ariel Winter attend Creative Coalition's 2012 Spotlight Initiative Gala Awards Dinner at The Supper Club by Stella Artois during the 2012 Sundance Film Festival on Jan. 22, 2012, in Park City, Utah.

Will Ferrell attends the "Bachelorette" premiere during the 2012 Sundance Film Festival held at Eccles Center Theatre on Jan. 23, 2012, in Park City, Utah.

Actress Ariel Winter attends Day 3 of the Stella Artois Lounge by Ally B at T-Mobile Google Music Village at The Lift on Jan. 22, 2012, in Park City, Utah.

Actresses Lizzy Caplan and Kirsten Dunst attend Sheets Energy presents BCDF Sundance Cocktail Party at Stella Artois by Ally B during the 2012 Sundance Film Festival on Jan. 22, 2012, in Park City, Utah.

Comedian Chris Rock and filmmaker Spike Lee attend the T-Mobile Presents Google Music at TAO, a nightlife event at the 2012 Sundance Film Festival on Jan. 22, 2012, in Park City, Utah.

From left to right, director Richard Bates Jr. and actors Traci Lords, AnnaLynne McCord and Matthew Gray Gubler attend Day 2 of the Variety Studio during the 2012 Sundance Film Festival held at Variety Studio At Sundance on Jan. 22, 2012, in Park City, Utah.

From left to right, actors Albert Delpy, Alexia Landeau, Alexandre Nahon, Chris Rock and Julie Delpy attend the "2 Days In New York" premiere during the 2012 Sundance Film Festival held at Eccles Center Theatre on Jan. 23, 2012, in Park City, Utah.

Actor Karan Soni, director Colin Trevorrow, writer Derek Connolly, actress Aubrey Plaza, actors Mark Duplass and Jake Johnson pose for a portrait during the 2012 Sundance Film Festival at the Getty Images Portrait Studio at T-Mobile Village at the Lift on Jan. 22, 2012, in Park City, Utah.

James Marsden attends the "Bachelorette" premiere during the 2012 Sundance Film Festival held at Eccles Center Theatre on Jan. 23, 2012, in Park City, Utah.

Actresses Rosemarie DeWitt, Olivia Thirlby, writer/director Ry Russo-Young and actress India Ennenga pose for a portrait during the 2012 Sundance Film Festival at the Getty Images Portrait Studio at T-Mobile Village at the Lift on Jan. 23, 2012, in Park City, Utah.

Actors John Hawkes, Helen Hunt and William H. Macy pose for a portrait during the 2012 Sundance Film Festival at the Getty Images Portrait Studio at T-Mobile Village at the Lift on Jan. 23, 2012, in Park City, Utah.

Actors Clancy Brown, Rob Mayes, Chase Williamson and Paul Giamatti pose for a portrait during the 2012 Sundance Film Festival at the Getty Images Portrait Studio at T-Mobile Village at the Lift on Jan. 23, 2012, in Park City, Utah.

Actors Chris Rock and Julie Delpy attend the "2 Days In New York" premiere during the 2012 Sundance Film Festival held at Eccles Center Theatre on Jan. 23, 2012, in Park City, Utah.

From left to right, Rebel Wilson, Kirsten Dunst and Lizzy Caplan attend the "Bachelorette" premiere during the 2012 Sundance Film Festival held at Eccles Center Theatre on Jan. 23, 2012, in Park City, Utah.

Singer Theophilus London attends Asher Roth and Theophilus London presented by Bing at The Bing Bar on Jan. 23, 2012, in Park City, Utah.

Kirsten Dunst and Lizzy Caplan attend the "Bachelorette" premiere during the 2012 Sundance Film Festival held at Eccles Center Theatre on Jan. 23, 2012, in Park City, Utah.

DJ Samantha Ronson performs at the T-Mobile Presents Google Music at TAO, an exclusive four-night concert series at Sundance to celebrate the launch of the new Google Music Magnifier program on Jan. 23, 2012, in Park City, Utah.

From left to right, actresses Kirsten Dunst, Rashida Jones and DJ Samantha Ronson attend the T-Mobile Presents Google Music at TAO, an exclusive four-night concert series at Sundance to celebrate the launch of the new Google Music Magnifier program on Jan. 23, 2012, in Park City, Utah.

Singer Theophilus London attends Asher Roth and Theophilus London presented by Bing at The Bing Bar on Jan. 23, 2012, in Park City, Utah.

Actress Parker Posey poses for a portrait during the 2012 Sundance Film Festival at the Getty Images Portrait Studio at T-Mobile Village at the Lift on Jan. 24, 2012, in Park City, Utah.

Actress Melissa Leo attends Day 4 of The Variety Studio during the 2012 Sundance Film Festival held at Variety Studio At Sundance on Jan. 24, 2012, in Park City, Utah.

From left to right, Eric Mabius, Michael Walker and Parker Posey attend Day 4 of The Variety Studio during the 2012 Sundance Film Festival held at Variety Studio At Sundance on Jan. 24, 2012, in Park City, Utah.

From left to right, Christopher Neil, Graham Phillips, Ty Burrell, and Anthony Anderson attends the "GOATS" premiere during the 2012 Sundance Film Festival held at Eccles Center Theatre on Jan. 24, 2012, in Park City, Utah.

Director Christopher Neil, actors Vera Farmiga, Ty Burrell, Dakota Johnson, David Duchovny and actor Graham Phillips pose for a portrait during the 2012 Sundance Film Festival at the Getty Images Portrait Studio at T-Mobile Village at the Lift on Jan. 25, 2012, in Park City, Utah.

Co-founder of record label DFA Records James Murphy spins at the "Shut Up And Play The Hits" official cast premiere party presented by Bing held at The Bing Bar on Jan. 24, 2012, in Park City, Utah.

Actress Parker Posey attends the "Price Check" premiere during the 2012 Sundance Film Festival held at Eccles Center Theatre on Jan. 25, 2012, in Park City, Utah.