According to Jean Reno, he decided to play Léon as if he were a little mentally slow and emotionally repressed. He felt that this would make audiences relax and realize that he wasn't someone who would take advantage of a vulnerable young girl.
Luc Besson is a film director, screenwriter, and producer. He directed using a distinctive style dubbed Cinéma du look by critics. In 1980, he founded his own production company, called Les Films du Loup, and later Les Films du Dauphin.