Stars enjoy the 2015 Sundance Film Festival

It's all about stars and ski fashion at the Sundance Film Festival in Park City, Utah.

The festivities got under way at the famous film fest -- which is also home to tons of parties, dinners, gifting suites, and of course, movies -- on January 22 and will run through February 1.

Everyone from James Marsden and Kellan Lutz to Toni Collette and Robert Redford have stopped in at the fest to kick back, mingle and promote their films.

Check out all the stars above and continue to watch as more A-list talent pops up throughout the week!