Monster (2003)

Charlize Theron transforms into Aileen Wuornos, a Florida sex worker who became one of America’s most infamous female serial killers. Wuornos endured an abusive childhood and severe personal trauma, which Theron channels into a performance balancing menace and humanity. Theron won the Academy Award, Golden Globe, and SAG Award for Best Actress, cementing this as one of the most celebrated portrayals in true-crime cinema.