Sid James as Mark Antony

Kenneth Williams as Julius Caesar

Kenneth Connor as Centurion Hengist Pod

Charles Hawtrey as Seneca

Joan Sims as Calpurnia

Jim Dale as Horsa

Amanda Barrie as Cleopatra

Victor Maddern as Sergeant-Major

Julie Stevens as Gloria

Sheila Hancock as Senna Pod

Jon Pertwee as Soothsayer

Francis de Wolff as Agrippa

Michael Ward as Archimedes

Brian Oulton as Brutus

Tom Clegg as Sosages

Tanya Binning as Virginia

David Davenport as Bilius

Peter Gilmore as Galley Master

Ian Wilson as Small Messenger

Brian Rawlinson as Hessian Driver

Gertan Klauber as Marcus

Warren Mitchell as Spencius

Michael Nightingale as Ancient Briton

Peter Jesson as Seth

E. V. H. Emmett as Narrator (voice)

Jack Arrow as Senator (uncredited)

Peter Avella as Horsa's Companion (uncredited)

Delta Balch as Citizen (uncredited)

Gloria Best as Handmaiden (uncredited)

Jimmy Charters as Citizen (uncredited)

Peggy Ann Clifford as Willa Claudia (uncredited)

Billy Cornelius as Horsa's Companion (uncredited)

John Corrie as Soldier (uncredited)

Victor Coventry as Senator (uncredited)

Bill Douglas as Companion (uncredited)

Sally Douglas as Mark Antony's Dusky Maiden (uncredited)

Maurice Dunster as Citizen (uncredited)

Hugh Elton as Soldier (uncredited)

Norman Fisher as Senator (uncredited)

Joanna Ford as Vestal Virgin (uncredited)

Peter Fraser as Horsa's Companion (uncredited)

Jill Goldston as Citizen (uncredited)

Richard Gregory as Senator (uncredited)

Pat Hagan as Senator (uncredited)

Victor Hagan as Senator (uncredited)

Patrick Halpin as Citizen (uncredited)

Mark Hardy as Guard at Caesar's Palace (uncredited)

Victor Harrington as Scribe (uncredited)

Walter Henry as Roman Soldier (uncredited)

George Holdcroft as Senator (uncredited)

Gloria Johnson as Vestal Virgin (uncredited)

Judi Johnson as Gloria's Bridesmaid (uncredited)

Gerry Judge as Senator (uncredited)

Pat Judge as Senator (uncredited)

Juba Kennerley as Senator (uncredited)

Cyril Kent as Senator (uncredited)

John Ketteringham as Solider (uncredited)

Anthony Lang as Senator (uncredited)

Roy Lansford as Mark Antony's Guard (uncredited)

Pat Lewis as Citizen (uncredited)

Jane Lumb as Vestal Virgin (uncredited)

Norman Mitchell as Heckler (uncredited)

Richard Neller as Senator (uncredited)

Tony O'Leary as Citizen (uncredited)

Cecil Paul as Senator (uncredited)

Fred Peck as Senator (uncredited)

Lionel Pope as Senator (uncredited)

Christine Rodgers as Handmaiden (uncredited)

Laurie Rose as Citizen (uncredited)

Frank Schock as Citizen (uncredited)

Vicki Smith as Vestal Virgin (uncredited)

Tony Snell as Bit Part (uncredited)

Philip Stewart as Senator (uncredited)

John Tatham as Senator (uncredited)

Thelma Taylor as Seneca's Servant (uncredited)

Reg Thomason as Citizen (uncredited)

Rita Tobin-Weske as Citizen (uncredited)

Joseph Tregonino as Citizen (uncredited)

Virginia Tyler as Handmaiden (uncredited)

James Ure as Citizen (uncredited)

Wanda Ventham as Pretty Bidder (uncredited)

Donna White as Vestal Virgin (uncredited)

Sonnie Willis as Senator (uncredited)