The Magic Box is a 1951 British Technicolor biographical drama film directed by John Boulting. The film stars Robert Donat as William Friese-Greene, with numerous cameo appearances by performers such as Peter Ustinov and Laurence Olivier. It was produced by Ronald Neame and distributed by British Lion Film Corporation. The film was a project of the Festival of Britain and adapted by Eric Ambler from the controversial biography by Ray Allister.