Léon: The Professional (1994)

Léon, the top hit man in New York, has earned a rep as an effective "cleaner". But when his next-door neighbors are wiped out by a loose-cannon DEA agent, he becomes the unwilling custodian of 12-year-old Mathilda. Before long, Mathilda's thoughts turn to revenge, and she considers following in Léon's footsteps.

Directed by: Luc Besson

Starring: Jean Reno, Natalie Portman, Gary Oldman, Danny Aiello, Peter Appel, Michael Badalucco

Links: IMDb, Movie posters, Movie stills