Leone "Léon" Montana
Played by: Jean RenoA mysterious assassin living alone. He ends up 'adopting' his young next-door neighbor after her family is murdered.
Played by: Natalie PortmanAn intelligent and tough young girl who becomes Léon's protégée following the death of her family.
Played by: Gary OldmanA corrupt DEA agent on drugs who slaughters Mathilda's family.