known professionally as Kat Dennings, is an American actress.Starting with a role in an episode of the HBO dramedy series Sex and the City, Dennings has since appeared 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, Thor, and Thor: The Dark World.Dennings starred in Charlie Bartlett in 2008, the story of a wealthy teenager (Anton Yelchin) who acts as a psychiatrist for his new public high school.She played Susan Gardner, Bartlett's love interest, and the daughter of the school's principal (Robert Downey, Jr.).She also starred in the teen romance Nick and Norah's Infinite Playlist, with Michael Cera.She was cast for a five-episode run on The WB's Everwood, but the role was recast with Nora Zehetner.Dennings continued working on television, guest-starring on Without a Trace as a teen whose boyfriend goes missing, and on Less than Perfect in 2003.She then starred on the short-lived WB sitcom Raising Dad from 2001 to 2002 as Sarah, a 15-year-old raised by her widowed father (Bob Saget), with a pre-teen sister (Brie Larson).
In February 2004, she was cast in a pilot for CBS titled Sudbury, about a family of modern-day witches, based on the 1998 film Practical Magic, but the series was not picked up.
Dennings had a recurring role on ER from 2005 to 2006 as Zoe Butler, and guest-starred in the CSI franchise twice: first on CSI itself, as Missy Wilson, in the 2004 episode "Early Rollout".
Then, on CSI: NY as Sarah Endecott, in the 2005 episode "Manhattan Manhunt".
Dennings made her feature film debut in Hilary Duff's Raise Your Voice in 2004 as Sloane, a somber piano student.
Since 2011, she stars alongside Beth Behrs in the CBS sitcom 2 Broke Girls.
Dennings made her professional debut with an appearance on HBO's Sex and the City in 2000, in the episode "Hot Child in the City", playing an obnoxious 13-year-old who hires Samantha to handle publicity for her bat mitzvah.