Adrian Grenier

Ramey Photo

The 2011 Sundance Film Festival kicked off last week Park City, Utah, and we've already told you the films to watch out for. Now, with the party in full swing, your favorite A-listers are hitting the scene.

Whether it's Chris Hemsworth hanging at the hottest parties, Adrian Grenier getting ready to shred on his snowboard or Zooey Deschanel rocking some awesome earmuffs, it's all here in our star sightings gallery. Check out all the action!

GET THE PICS: 2011 Sundance: Star Sightings

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