Marlon Brando
Role: Mark Antony
John Gielgud
Role: Cassius
Louis Calhern
Role: Julius Caesar
Edmond O'Brien
Role: Casca
Greer Garson
Role: Calpurnia
George Macready
Role: Marullus
Michael Pate
Role: Flavius
Richard Hale
Role: A Soothsayer
John Hoyt
Role: Decius Brutus
Tom Powers
Role: Metellus Cimber
William Cottrell
Role: Cinna
Jack Raine
Role: Trebonius
Morgan Farley
Role: Artemidorus
Bill Phipps
Role: Servant to Antony
Douglass Watson
Role: Octavius Caesar
Douglass Dumbrille
Role: Lepidus
Michael Ansara
Role: Pindarus
Dayton Lummis
Role: Messala
Edmund Purdom
Role: Strato
Paul Guilfoyle
Role: First Citizen of Rome
John Doucette
Role: A Carpenter, Second Citizen
Lawrence Dobkin
Role: Third Citizen of Rome
Jo Gilbert
Role: Fourth Citizen of Rome
Chester Stratton
Role: Servant to Caesar
Lumsden Hare
Role: Publius
Vic Perry
Role: Popilius Lena
Michael Tolan
Role: Officer to Octavius
Rhys Williams
Role: Lucilius
John Parrish
Role: Titinius
Stephen Roberts
Role: Dardanius
Thomas Browne Henry
Role: Volumnius
David Bond
Role: Citizen of Rome
Ann Tyrrell
Role: Citizen of Rome
John O'Malley
Role: Citizen of Rome
Oliver Blake
Role: Citizen of Rome
Alvin Hurwitz
Role: Citizen of Rome
Donald Elson
Role: Citizen of Rome
John Call
Role: Citizen of Rome
Rudy Germane
Role: Citizen of Rome (uncredited)
William Phipps
Role: Servant to Antony
Chet Stratton
Role: Servant to Caesar
John Alderson
Role: Citizen of Rome (uncredited)
Al Bain
Role: Citizen of Rome (uncredited)
Robert Fuller
Role: Citizen of Rome (uncredited)
Ned Glass
Role: Cobbler (uncredited)
Dabbs Greer
Role: Citizen of Rome (uncredited)
Robert Nichols
Role: Citizen of Rome (uncredited)
William H. O'Brien
Role: Senator (uncredited)
Vic Perrin
Role: Hoodlum (uncredited)
Joe Ploski
Role: Citizen of Rome (uncredited)
Clark Ross
Role: Citizen of Rome (uncredited)
Irene Tedrow
Role: Citizen of Rome (uncredited)