Film d'auteur (also called cinéma d'auteur) is an expression used to describe the films of a film director or a screenwriter which reflect their artistic personality. This term seeks before all to link the work of a filmmaker to preferred themes and the coherence of an innovative and singular style. It is, however, a subjective notion of which there is no rigorous definition. Film d'auteur is frequently grouped with "Cinéma d'art et d'essai" or research cinema.