In the film The Magic Box, which was made in England in 1950, the great English actor Robert Donat plays William Friese-Greene—one of the people who invented movies. The Magic Box was packed with guest stars. It was made for an event called the Festival of Britain. You had about fifty or sixty of the biggest actors in England at the time, all doing for the most part little cameos, including the man who played the policeman—that was Sir Laurence Olivier.