Amanda Peet (born January 11, 1972) is an American actress.

After studying with Uta Hagen, Peet began her career in television commercials, and progressed to small roles in television and indie movies. Featured roles in films such as The Whole Nine Yards (2000) brought her recognition and she was named one of People's "50 Most Beautiful People in the World". Her subsequent film roles were more prominent, and included Something's Gotta Give (2003) and Syriana (2005).

Peet was born in New York City, the daughter of Penny (née Levy), a social worker, and Charles Peet, a corporate lawyer. The two are now divorced. Her father is a Quaker and her mother is Jewish. She has one older sister, Alisa Peet, who is a doctor of internal medicine at Temple University Hospital in Philadelphia. Peet attended Friends Seminary, then studied history at and graduated from Columbia University, where she auditioned for acting teacher Uta Hagen and decided to become an actress after taking Hagen's class. During her four-year period of study with Hagen, Peet appeared in the off-Broadway revival of Clifford Odets's Awake and Sing.