Sean Connery
Zed
Charlotte Rampling
Consuella
Sara Kestelman
May
John Alderton
Friend
Sally Anne Newton
Avalow
Niall Buggy
Arthur Frayn / Zardoz
Bosco Hogan
George Saden
Jessica Swift
Apathetic
Bairbre Dowling
Star
Christopher Casson
Old Scientist
Reginald Jarman
Death (voice)
John Boorman
Farming Brutal Shot by Zed (uncredited)
Daisy Boorman
Young Eternal (uncredited)
Katrine Boorman
Young Eternal (uncredited)
Telsche Boorman
Young Eternal (uncredited)
David de Keyser
Tabernacle (voice) (uncredited)