Olivia Munn Chops Off Her Hair!

Credit: Jon Kopaloff/FilmMagic; Jesse Grant/WireImage.com

Olivia Munn rang in the new year as a new woman!

After the 30-year-old Daily Show correspondent informed her Twitter followers that she'd lopped off her locks for a movie role, Munn debuted her sassy new look at the grand opening of Marquee Nightclub in Las Vegas Thursday.

Munn -- who wore an Urban Outfitters top, an Alexander McQueen skirt and YSL heels -- next appears in the NBC comedy Perfect Couples.

Tell Us: Do like Olivia's shorter style?