The Katherine Litwack (born June 13, 1986), better known by the stage name Kat Dennings, is an American actress. Rising with a role in an episode of the HBO dramedy series Sex and the City, Dennings has since appear in the films The 40-Year-Old Virgin, Big Momma's House 2, Charlie Bartlett, Raise Your Voice, The House Bunny, Defendor, Nick and Norah's Infinite Playlist, and Thor. She as well stars in the CBS television series, 2 Broke Girls.