Marie-José Benhalassa (22 April 1940 – 10 October 2019), known professionally as Marie-José Nat, was a French actress. Among her notable works in cinema were the sequel films Anatomy of a Marriage: My Days with Jean-Marc and Anatomy of a Marriage: My Days with Françoise (1963), directed by André Cayatte. In 1974, she received a Cannes Film Festival Award for Best Actress for her performance in the film Violins at the Ball.