Because the appeal of the movie depended so much on elements of surprise, Hitchcock did all the publicity and interviews himself, forbidding his actors from speaking to the media about the film.
Without a doubt, his most famous movie is Psycho, the 1960s thriller starring Anthony Perkins and Janet Leigh. The influence of the film on modern cinema cannot be overstated: Hitch played with conventions by killing his apparent star early in the movie, by introducing a compelling twist ending, and by using 50 different shots (most of them close-ups) in the 2-minute shower scene in which Perkins’ Norman Bates kills Leigh’s character. Because the appeal of the movie depended so much on elements of surprise, Hitchcock did all the publicity and interviews himself, forbidding his actors from speaking to the media about the film. He even convinced theaters not to let customers in late. The movie was not only an enormous success, but it also helped to inspire and further the cinematic interest in the serial killer, the psychopath, the murderer who commits his crime for reasons that have nothing to do with revenge or criminal gain.