Moonlight Sonata is a 1937 British drama film directed by Lothar Mendes and written by E. M. Delafield and Edward Knoblock. The film stars Ignacy Jan Paderewski, Charles Farrell, Marie Tempest, Barbara Greene and Eric Portman. The film was released on 11 February 1937, by United Artists and re-released in 1943 as The Charmer (shortened).

Lothar Mendes was a German-born screenwriter and film director. His two best known films are Jew Süss (1934) and The Man Who Could Work Miracles (1936), both productions for British studios.