Le Samouraï (1967)
Melville's 1967 French crime film. Alain Delon as the hitman in trench coat and fedora.
Actor: Cathy Rosier
Cathy Rosier played the pianist in Le Samouraï whose testimony protects the hitman for reasons the film never explains, and the ambiguity is the point. She was born in Martinique and worked in French cinema and as a journalist.