Marlon Brando
Mark Antony

James Mason
Brutus

John Gielgud
Cassius

Louis Calhern
Julius Caesar

Edmond O'Brien
Casca

Greer Garson
Calpurnia

Deborah Kerr
Portia

George Macready
Marullus

Michael Pate
Flavius

Richard Hale
A Soothsayer

Alan Napier
Cicero

John Hoyt
Decius Brutus

Tom Powers
Metellus Cimber

Jack Raine
Trebonius

Ian Wolfe
Ligarius

Morgan Farley
Artemidorus

Douglass Dumbrille
Lepidus

Michael Ansara
Pindarus

Dayton Lummis
Messala

Edmund Purdom
Strato

Paul Guilfoyle
First Citizen of Rome

John Doucette
A Carpenter, Second Citizen

Lawrence Dobkin
Third Citizen of Rome

Lumsden Hare
Publius

Michael Tolan
Officer to Octavius

Rhys Williams
Lucilius

John Lupton
Varro

John Parrish
Titinius

Thomas Browne Henry
Volumnius

David Bond
Citizen of Rome

Ann Tyrrell
Citizen of Rome

Oliver Blake
Citizen of Rome

Donald Elson
Citizen of Rome