- Sidney James
- Mark Antony
- Kenneth Williams
- Julius Caesar
- Kenneth Connor
- 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
- Jack Arrow
- Senator
- Peter Avella
- Horsa's Companion
- Delta Balch
- Citizen
- Gloria Best
- Hand Maiden
- Jimmy Charters
- Citizen
- Peggy Ann Clifford
- Willa Claudia
- Billy Cornelius
- Horsa's Companion
- John Corrie
- Soldier
- Bill Douglas
- Second Companion
- Sally Douglas
- Antony's Dusky Maiden
- Maurice Dunster
- Citizen
- Hugh Elton
- Soldier
- Norman Fisher
- Senator
- Joanna Ford
- Vestal Virgin
- Peter Fraser
- Horsa's Companion
- Jill Goldston
- Citizen
- Pat Hagan
- Senator
- Victor Hagan
- Senator
- Patrick Halpin
- Citizen
- Mark Hardy
- Guard at Caesar's Palace
- Victor Harrington
- Scribe
- Walter Henry
- Roman Soldier
- George Holdcroft
- Senator
- Gloria Johnson
- Vestal Virgin
- Judi Johnson
- Gloria's Bridesmaid
- Gerry Judge
- Senator
- Pat Judge
- Senator
- Juba Kennerley
- Senator
- Cyril Kent
- Senator
- John Ketteringham
- Soldier
- Anthony Lang
- Senator
- Roy Lansford
- Mark Antony's Guard
- Pat Lewis
- Citizen
- Pat Lewis
- Citizen
- Jane Lumb
- Vestal Virgin
- Norman Mitchell
- Heckler
- Richard Neller
- Senator
- Tony O'Leary
- Citizen
- Cecil Paul
- Senator
- Christine Rodgers
- Hand Maiden
- Laurie Rose
- Citizen
- Frank Schock
- Citizen
- Vicki Smith
- Vestal Virgin
- Tony Snell
- Bit Part
- Philip Stewart
- Senator
- Phillip Stewart
- Senator
- John Tatham
- Senator
- Thelma Taylor
- Seneca's Servant
- Reg Thomason
- Citizen
- Rita Tobin-Weske
- Citizen
- Joseph Tregonino
- Citizen
- Virginia Tyler
- Hand Maiden
- James Ure
- Citizen
- Wanda Ventham
- Pretty Bidder
- Donna White
- Vestal Virgin
- Sonnie Willis
- Senator
