It was exciting, no doubt, to watch silent films to the accompaniment of musical excerpts played by cinema orchestras, but the 1930s gave audiences the chance to see stars sing and act. That decade consequently offers valuable historical insight into vocal practice and performance technique. This chapter begins with an overview of freshly created screen operettas and of films adapting stage operettas. It briefly examines Die Drei von der Tankstelle (1930) and other German films, before moving to British and American films. The demands of film are contrasted with techniques required in the theatre. The chapter then looks at the practice of adaptation in Hollywood, and it ends with a discussion of the operetta Heimat film in Germany.