Julius Caesar is a 1953 Metro-Goldwyn-Mayer film adaptation of the play by Shakespeare, directed by Joseph L. Mankiewicz, who also wrote the uncredited screenplay, and produced by John Houseman. The original music score is by Miklós Rózsa. The film stars Marlon Brando as Mark Antony, James Mason as Brutus, John Gielgud as Cassius, Louis Calhern as Julius Caesar, Edmond O'Brien as Casca, Greer Garson as Calpurnia, and Deborah Kerr as Portia.