Now look Roman... says Pamela Mason, as she prepares to snap an off-stage picture of husband James Mason, dressed in his toga for MGMโs Julius Caesar. William Shakespeareโs Julius Caesar stars Marlon Brando as Mark Antony, James Mason as Brutus, John Gielgud as Cassius, Louis Calhern as Caesar, Edmond OโBrien as Casca, Greer Garson as Calpurnia and Deborah Kerr as Portia. The picture was directed by Joesph L. Mankiewicz and produced by John Houseman.