Sara Foster (born August 2, 1981) is an American actress. She used to be a fashion model before moving to the film industry. She is the daughter of David Foster.

A former model, Sara Foster is the daughter of famed Canadian composer David Foster. She appeared in the Backstreet Boys video "Shape of My Heart" as well as an episode of the Showtime series Going to California. She later hosted 10 episodes of the program ET on MTV, an Entertainment Tonight style show. Through her work on the program, she was noticed by George Armitage, the director and co-writer of the feature film The Big Bounce (2004). He hired her to play Nancy Hayes, a 19-year-old flirt who seduces a character played by Owen Wilson.

Foster has since completed a starring role in her second film, D.E.B.S. (2004), about girls who are recruited to be secret agents based on their SAT test scores. She dated Leonardo DiCaprio, shortly after he broke up with his girlfriend of two years, supermodel Gisele Bunchen.