Sid James as Marc Antony

Kenneth Williams as Caeser

Jim Dale as Horsa

Amanda Barrie as Cleopatra

Joan Sims as Calpurnia

Kenneth Connor as Hengist Pod

Charles Hawtrey as Seneca

Julie Stevens as Gloria

Brian Oulton as Brutus

Michael Ward as Archimedes

Francis de Wolff as Agrippa

Victor Maddern as Segeant-Major

Sheila Hancock as Senna Pod

Jon Pertwee as Soothsayer

Gertan Klauber as Marcus

Warren Mitchell as Spencius

David Davenport as Bilius

Tanya Binning as Virginia

Tom Clegg as Sosages

Peter Gilmore as Galley Master

Michael Nightingale as Ancient Briton

Ian Wilson as Small Messenger

Peter Jesson as Seth

Brian Rawlinson as Hessian Driver

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

Wanda Ventham as Pretty Bidder (uncredited)

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

Percy Herbert as Guard (uncredited)

Norman Mitchell as Heckler (uncredited)

Jill Goldston as Citizen (uncredited)