Belle de jour is a 1967 French film starring Catherine Deneuve as a woman who decides to spend her days as a prostitute while her husband is at work. The title is the French name of the daylily (literally: "daylight beauty"), a flower that blooms only during the day, but also refers to a prostitute whose trade is conducted in daytime. The film was directed by the Spanish director Luis Buñuel, based on the 1928 novel of the same name by Joseph Kessel. American director Martin Scorsese promoted a 2002 release of the film on DVD.