Marc Antoine
Marlon Brando
Brutus
James Mason
Cicero
Alan Napier
Decius Brutus
John Hoyt
Metellus Cimber
Tom Powers
Cinna
William Cottrell
Trebonius
Jack Raine
Ligarius
Ian Wolfe
Artemidorus
Morgan Farley
Servant to Antony
Bill Phipps
Octavius Caesar
Douglass Watson
Lepidus
Douglass Dumbrille
Cassius
John Gielgud
Pindarus
Michael Ansara
Messala
Dayton Lummis
Strato
Edmund Purdom
First Citizen of Rome
Paul Guilfoyle
A Carpenter, Second Citizen
John Doucette
Third Citizen of Rome
Lawrence Dobkin
Fourth Citizen of Rome
Jo Gilbert
Lucius
John Hardy
Servant to Caesar
Chester Stratton
Publius
Lumsden Hare
Jules César
Louis Calhern
Popilius Lena
Vic Perry
Officer to Octavius
Michael Tolan
Lucilius
Rhys Williams
Varro
John Lupton
Titinius
John Parrish
Clitus
Joe Waring
Dardanius
Stephen Roberts
Volumnius
Thomas Browne Henry
Citizen of Rome
David Bond
Ann Tyrrell
Casca
Edmond O'Brien
John O'Malley
Oliver Blake
Alvin Hurwitz
Donald Elson
John Call
Citizen of Rome (uncredited)
Rudy Germane
Calpurnia
Greer Garson
Portia
Deborah Kerr
Marullus
George Macready
Flavius
Michael Pate
A Soothsayer
Richard Hale
Music
Miklós Rózsa
Recording Supervision
Douglas Shearer
Makeup Supervisor
William Tuttle
Director
Joseph L. Mankiewicz
Set Decoration
Edwin B. Willis
Producer
John Houseman
Assistant Director
Howard W. Koch
Theatre Play
William Shakespeare
Art Direction
Cedric Gibbons
Hairstylist
Sydney Guilaroff
Edward C. Carfagno
Editor
John D. Dunning
Special Effects
Warren Newcombe
Hugh Hunt
Costume Design
Herschel McCoy
Director of Photography
Joseph Ruttenberg
Technical Advisor
P.M. Pasinetti