Léon: The Professional
- annos singulos: 1994
- Patriam: United States of America, France
- genus: Crime, Drama, Action
- Studio: Gaumont, Les Films du Dauphin, Columbia Pictures
- keyword: hotel room, new york city, immigrant, assassin, police brutality, corruption, s.w.a.t., hitman, loss of loved one, training, revenge, murder, loneliness, neighbor, tragic love, city life, neo-noir, complex relationship, suspenseful
- Director: Luc Besson
- cast: Jean Reno, Natalie Portman, Gary Oldman, Danny Aiello, Peter Appel, Michael Badalucco