Sidney James
Mark Antony

Kenneth Williams
Julius Caesar

Kenneth Connor
Centurion Hengist Pod

Charles Hawtrey
Seneca

Joan Sims
Calpurnia

Jim Dale
Horsa

Amanda Barrie
Cleopatra

Victor Maddern
Sergeant-Major

Julie Stevens
Gloria

Sheila Hancock
Senna Pod

Jon Pertwee
Soothsayer

Francis de Wolff
Agrippa

Michael Ward
Archimedes

Brian Oulton
Brutus

Tom Clegg
Sosages

Tanya Binning
Virginia

David Davenport
Bilius

Peter Gilmore
Galley Master

Ian Wilson
Small Messenger

Brian Rawlinson
Hessian Driver

Gertan Klauber
Marcus

Warren Mitchell
Spencius

Michael Nightingale
Ancient Briton

Peter Jesson
Seth

E. V. H. Emmett
Narrator (voice)

Jack Arrow
Senator (uncredited)

Peter Avella
Horsa's Companion (uncredited)

Delta Balch
Citizen (uncredited)

Gloria Best
Handmaiden (uncredited)

Jimmy Charters
Citizen (uncredited)

Peggy Ann Clifford
Willa Claudia (uncredited)

Billy Cornelius
Horsa's Companion (uncredited)

John Corrie
Soldier (uncredited)

Victor Coventry
Senator (uncredited)

Bill Douglas
Companion (uncredited)

Sally Douglas
Mark Antony's Dusky Maiden (uncredited)

Maurice Dunster
Citizen (uncredited)

Hugh Elton
Soldier (uncredited)

Norman Fisher
Senator (uncredited)

Joanna Ford
Vestal Virgin (uncredited)

Peter Fraser
Horsa's Companion (uncredited)

Jill Goldston
Citizen (uncredited)

Richard Gregory
Senator (uncredited)

Pat Hagan
Senator (uncredited)

Victor Hagan
Senator (uncredited)

Patrick Halpin
Citizen (uncredited)

Mark Hardy
Guard at Caesar's Palace (uncredited)

Victor Harrington
Scribe (uncredited)

Walter Henry
Roman Soldier (uncredited)

George Holdcroft
Senator (uncredited)

Gloria Johnson
Vestal Virgin (uncredited)

Judi Johnson
Gloria's Bridesmaid (uncredited)

Gerry Judge
Senator (uncredited)

Pat Judge
Senator (uncredited)

Juba Kennerley
Senator (uncredited)

Cyril Kent
Senator (uncredited)

John Ketteringham
Solider (uncredited)

Anthony Lang
Senator (uncredited)

Roy Lansford
Mark Antony's Guard (uncredited)

Pat Lewis
Citizen (uncredited)

Jane Lumb
Vestal Virgin (uncredited)

Norman Mitchell
Heckler (uncredited)

Richard Neller
Senator (uncredited)

Tony O'Leary
Citizen (uncredited)

Cecil Paul
Senator (uncredited)

Fred Peck
Senator (uncredited)

Lionel Pope
Senator (uncredited)

Christine Rodgers
Handmaiden (uncredited)

Laurie Rose
Citizen (uncredited)

Frank Schock
Citizen (uncredited)

Vicki Smith
Vestal Virgin (uncredited)

Tony Snell
Bit Part (uncredited)

Philip Stewart
Senator (uncredited)

John Tatham
Senator (uncredited)

Thelma Taylor
Seneca's Servant (uncredited)

Reg Thomason
Citizen (uncredited)

Rita Tobin-Weske
Citizen (uncredited)

Joseph Tregonino
Citizen (uncredited)

Virginia Tyler
Handmaiden (uncredited)

James Ure
Citizen (uncredited)

Wanda Ventham
Pretty Bidder (uncredited)

Donna White
Vestal Virgin (uncredited)

Sonnie Willis
Senator (uncredited)