Marc Antony

Marlon Brando

Brutus

James Mason

Cassius

John Gielgud

Julius Caesar

Louis Calhern

Casca

Edmond O'Brien

Calpurnia

Greer Garson

Portia

Deborah Kerr

Marullus

George Macready

Flavius

Michael Pate

Soothsayer

Richard Hale

Cicero

Alan Napier

Titinius

John Parrish

Decius Brutus

John Hoyt

Cinna

William Cottrell

Metellus Cimber

Tom Powers

Lucius

John Hardy

Trebonius

Jack Raine

Ligarius

Ian Wolfe

Artemidorus

Morgan Farley

Popilius Lena

Victor Perry

Servant to Antony

Bill Phipps

Octavius Caesar

Douglass Watson

Publius

Lumsden Hare

Lepidus

Douglass Dumbrille

Pindarus

Michael Ansara

Lucilius

Rhys Williams

Messala

Dayton Lummis

Strato

Edmund Purdom

First Citizen of Rome

Paul Guilfoyle

Carpenter, Citizen of Rome

John Doucette

Third Citizen of Rome

Lawrence Dobkin

Fourth Citizen of Rome

Jo Gilbert

Varro

John Lupton

Claudius

Preston Hanson

Servant to Caesar

Chet Stratton

Clitus

Joseph Waring

Dardanius

Steve Roberts

Servant to Caesar

Chester Stratton

Volumnius

Thomas Browne Henry

Cinna the Poet

O.Z. Whitehead

Popilius Lena

Vic Perry

Officer to Octavius

Michael Tolan

Clitus

Joe Waring

Citizen of Rome

David Bond

Dardanius

Stephen Roberts

Citizen of Rome

Ann Tyrrell

Citizen of Rome

John O'Malley

Citizen of Rome

Oliver Blake

Citizen of Rome

Alvin Hurwitz

Citizen of Rome

Donald Elson

Citizen of Rome (uncredited)

John Call

Citizen of Rome (uncredited)

John Alderson

Cobbler (uncredited)

Ned Glass

Citizen of Rome (uncredited)

Henny Backus

Citizen of Rome (uncredited)

Al Bain

Citizen of Rome (uncredited)

John Barton

Citizen of Rome (uncredited)

Ray Beltram

Soldier (uncredited)

George Blagoi

Citizen of Rome (uncredited)

Eumenio Blanco

Citizen of Rome (uncredited)

Oscar Blank

Citizen of Rome (uncredited)

Joe Brooks

Citizen of Rome (uncredited)

Michael Cirillo

Citizen of Rome (uncredited)

Bill Clark

Citizen of Rome (uncredited)

Booth Colman

Citizen of Rome (uncredited)

Gene Coogan

Citizen of Rome (uncredited)

Jimmy Dime

Hoodlum (uncredited)

Darren Dublin

Citizen of Rome (uncredited)

Ken DuMain

Citizen of Rome / Centurion Lookout (uncredited)

Charles Ferguson

Citizen of Rome (uncredited)

Robert Fuller

Citizen of Rome (uncredited)

Elias Gamboa

Hoodlum (uncredited)

Leonard George

Citizen of Rome (uncredited)

Rudy Germane

Citizen of Rome (uncredited)

Joseph Glick

Citizen of Rome (uncredited)

Dabbs Greer

Roman Soldier (uncredited)

Chester Hayes

Senator (uncredited)

Stuart Holmes

Soldier (uncredited)

Shep Houghton

Citizen of Rome by Mark Antony's Speech (uncredited)

Kenneth Kendall

Senator (uncredited)

Russell Meeker

Citizen of Rome (uncredited)

Neyle Morrow

Citizen of Rome (uncredited)

Robert Nichols

Senator (uncredited)

William H. O'Brien

Hoodlum (uncredited)

Vic Perrin

Citizen of Rome (uncredited)

Jack Perry

Citizen of Rome (uncredited)

Joe Ploski

Citizen of Rome (uncredited)

Harry 'Snub' Pollard

Sentry (uncredited)

Barry Regan

Little Man (uncredited)

Norman Rice

Citizen of Rome (uncredited)

Victor Romito

Citizen of Rome (uncredited)

Clark Ross

Citizen of Rome (uncredited)

Phil Schumacher

Senator (uncredited)

Scott Seaton

Citizen of Rome (uncredited)

Cap Somers

Citizen of Rome (uncredited)

Ray Spiker

Citizen of Rome (uncredited)

Irene Tedrow