Monster is a 2003 crime drama film directed by Patty Jenkins and starring Charlize Theron. Theron delivers a powerful performance as Aileen Wuornos, a real-life serial killer. The film follows Aileen's journey from a troubled childhood to her life as a prostitute and eventually her descent into murder. Theron's portrayal of Aileen earned her critical acclaim and numerous awards, including an Academy Award for Best Actress. Monster is a gripping and intense film that showcases Theron's incredible acting skills.