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)

Katrine Boorman

Young Eternal (uncredited)

Telsche Boorman

Young Eternal (uncredited)

David de Keyser

Tabernacle (voice) (uncredited)