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)