Marlon Brando

Character: Mark Antony

James Mason

Character: Brutus

John Gielgud

Character: Cassius

Louis Calhern

Character: Julius Caesar

Edmond O'Brien

Character: Casca

Greer Garson

Character: Calpurnia

Deborah Kerr

Character: Portia

George Macready

Character: Marullus

Michael Pate

Character: Flavius

Richard Hale

Character: A Soothsayer

Alan Napier

Character: Cicero

John Hoyt

Character: Decius Brutus

Tom Powers

Character: Metellus Cimber

William Cottrell

Character: Cinna

Jack Raine

Character: Trebonius

Ian Wolfe

Character: Ligarius

Morgan Farley

Character: Artemidorus

Bill Phipps

Character: Servant to Antony

Douglass Watson

Character: Octavius Caesar

Douglass Dumbrille

Character: Lepidus

Michael Ansara

Character: Pindarus

Dayton Lummis

Character: Messala

Edmund Purdom

Character: Strato

Paul Guilfoyle

Character: First Citizen of Rome

John Doucette

Character: A Carpenter, Second Citizen

Lawrence Dobkin

Character: Third Citizen of Rome

Jo Gilbert

Character: Fourth Citizen of Rome

John Hardy

Character: Lucius

Chester Stratton

Character: Servant to Caesar

Lumsden Hare

Character: Publius

Vic Perry

Character: Popilius Lena

Michael Tolan

Character: Officer to Octavius

Rhys Williams

Character: Lucilius

John Lupton

Character: Varro

John Parrish

Character: Titinius

Joe Waring

Character: Clitus

Stephen Roberts

Character: Dardanius

Thomas Browne Henry

Character: Volumnius

David Bond

Character: Citizen of Rome

Ann Tyrrell

Character: Citizen of Rome

John O'Malley

Character: Citizen of Rome

Oliver Blake

Character: Citizen of Rome

Alvin Hurwitz

Character: Citizen of Rome

Donald Elson

Character: Citizen of Rome

John Call

Character: Citizen of Rome

Rudy Germane

Character: Citizen of Rome (uncredited)

William Phipps

Character: Servant to Antony

Chet Stratton

Character: Servant to Caesar

John Alderson

Character: Citizen of Rome (uncredited)

Al Bain

Character: Citizen of Rome (uncredited)

Robert Fuller

Character: Citizen of Rome (uncredited)

Ned Glass

Character: Cobbler (uncredited)

Dabbs Greer

Character: Citizen of Rome (uncredited)

Robert Nichols

Character: Citizen of Rome (uncredited)

William H. O'Brien

Character: Senator (uncredited)

Vic Perrin

Character: Hoodlum (uncredited)

Joe Ploski

Character: Citizen of Rome (uncredited)

Clark Ross

Character: Citizen of Rome (uncredited)

Irene Tedrow

Character: Citizen of Rome (uncredited)