Leon: The Professional is a crime thriller film directed by Luc Besson. Natalie Portman plays Mathilda, a young girl who seeks the help of a professional hitman, Leon, played by Jean Reno, after her family is murdered. The film explores the relationship between Mathilda and Leon, as well as themes of redemption and the consequences of violence. Portman's performance as Mathilda, despite her young age, was widely praised.