Jennifer Aniston on ski vacation with Justin Theroux

Jennifer Aniston spent the first week of 2012 with beau Justin Theroux on a ski vacation in Colorado.

According to sources, the two vacationed in a 13,300 square foot private residence in the Mountain Village outside the town of Telluride - where they were first spotted December 31.

"They had a group of friends [that left] Monday... Justin and Jen [stayed] until Thursday. They had a ski instructor every day," Us magazine quoted a source as saying.

"Jennifer gets up and goes skiing ufffd Pretty much she's camped out at the house, keeping a low profile," the source added.

According to other sources, Aniston took a ski lesson with her friend Chelsea Handler.