Charlize Theron won an Academy Award for Best Actress for her performance in which film?

For her performance in the 2003 film "Monster", Charlize Theron won the Academy Award for Best Actress. "Monster" is a biographical crime drama that was written and directed by Patty Jenkins in her feature directorial debut. The film is about serial killer Aileen Wuornos (Theron), a former street prostitute who murders seven of her male clients between 1989 and 1990. Wuornos was executed in Florida in 2002.

This film was produced by Charlize Theron, Mark Damon, Clark Peterson, Donald Kushner, and Brad Wyman. Film editing was done by Arthur Coburn and Steven Bernstein handled the film's cinematography.

With its release, "Monster" received a great deal of acclaim from top movie critics. The film became a box office success, grossing $60.4 million on an $8 million budget. "Monster" was chosen by the American Film Institute (AFI) as one of the top ten films of 2003.