Inside This Weekend's Wild Sundance Parties [Photos]

In addition to film premieres and panels, the people are there to party.

For ten days every January, the pristine, small mountain town usually known as Park City, Utah, becomes a playground for Hollywood elite.

Paris Hilton, Nicole Kidman, Jessica Biel, James Franco and Joseph Gordon-Levitt are just a few of the names who made it to this year's annual festival.

But when they weren't promoting their films, celebrities (and wannabes) were partying until the wee morning hours at one of the many pop-up restaurants, lounges or nightclubs.