Katherine Litwack (born June 13, 1986), better known by the stage name Kat Dennings, is an American actress. Emerging with a role in an episode of the television series Sex and the City, she has been in the films Big Momma's House 2 (2006), Charlie Bartlett, The House Bunny and Nick and Norah's Infinite Playlist (2008).
Dennings was born and raised in the Bryn Mawr area near Philadelphia, Pennsylvania. Her mother, Ellie Judith Litwack, is a poet and speech therapist, her father, Gerald J. Litwack, a molecular pharmacologist and former Associate Dean for Scientific Affairs at Thomas Jefferson University. Dennings is the youngest of five children, including an older brother, Geoffrey S. Litwack, and an older sister Deborah. Her family is Jewish. She adopted the name Dennings as her professional name when she was younger. Dennings was home schooled; her only enrollment at a traditional school was for a half-day at Friends' Central School. She graduated from school early, at the age of 14. She moved with her family to Los Angeles, California around 2002 so that she could act full time. Her parents initially considered her idea of pursuing an acting career to be, according to Dennings,