"Jamaica Inn" was one of the first adaptations of du Maurier's work done in 1939. It starred Maureen O'Hara and Charles Laughton. It is another Alfred Hitchcok movie.
"Frenchman's Creek" was filmed in 1944 and starred Joan Fontaine and Arturo de Cordova.
"My Cousin Rachel" was filmed in 1952, and starred Olivia de Havilland and Richard Burton.
"The Scapegoat" is a 1959 movie starring Alec Guiness and Bette Davis.
In 1963, Alfred Hitchcock made the movie "The Birds" bases from a short story written by du Maurier. It starred Tippi Hedren, Rod Taylor, Jessica Tandy, and Suzanne Pleshette. It was definitely a frightning movie, as only Hitchcock can do!
"Don't Look Now" was a short story written by du Maurier. The movie was made in 1973 and starred Julie Christie and Donald Sutherland.