- Sid James as Mark Antony
- Kenneth Williams as Julius Caesar
- Charles Hawtrey as Seneca
- Kenneth Connor as Hengist Pod
- 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
- Brian Oulton as Brutus
- Michael Ward as Archimedes
- Francis de Wolff as Agrippa
- Tom Clegg as Sosages
- Tanya Binning as Virginia
- David Davenport as Bilius
- Peter Gilmore as Galley master
- Ian Wilson as Messenger
- Norman Mitchell as Heckler
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- Brian Rawlinson as Hessian driver
- Gertan Klauber as Marcus
- Warren Mitchell as Spencius
- Peter Jesson as Companion
- Michael Nightingale as Caveman
- Judi Johnson as Gloria's bridesmaid
- Thelma Taylor as Seneca's servant
- Sally Douglas as Antony's dusky maiden
- Wanda Ventham as Pretty bidder
- Peggy Ann Clifford as Willa Claudia
- Mark Hardy as Guard at Caesar's palace
- E.V.H. Emmett as Narrator
- Christine Rodgers as Hand maiden
- Gloria Best as Hand maiden
- Virginia Tyler as Hand maiden
- Gloria Johnson as Vestal Virgin
- Joanna Ford as Vestal Virgin
- Donna White as Vestal Virgin
- Jane Lumb as Vestal Virgin
- Vicki Smith as Vestal Virgin
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