Katie Holmes is a Wild Party Animal at Sundance!

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While the cats away the mouse will play. Katie Holmes has been the life of the party at the Sundance Film Festival this week! No joke!

“Katie is all over the place in Park City and really coming out of her shell,” a film festival insider tells HollywoodLIfe.com. “I thought she was snobby and uptight but she’s really very sweet and VERY talkative. At one point I was like ‘Is she ever going to shut up?’”

The 31-year-old actress even was seen drinking during a private dinner for her film 'The Extra Man'. Katie's drink of choice Ketel One and Coke.

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