Peter Sellers
Grand Duchess Gloriana XII / Prime Minister Count Rupert Mountjoy / Tully Bascombe
Jean Seberg
Helen Kokintz
William Hartnell
Will Buckley
David Kossoff
Professor Alfred Kokintz
Leo McKern
Benter
MacDonald Parke
General Snippet
Austin Willis
United States Secretary of Defense
Timothy Bateson
Roger
Monte Landis
Cobbley
Alan Gifford
Air Raid Warden
Colin Gordon
BBC Announcer
Harold Kasket
Pedro
Guy Deghy
Soviet Ambassador (uncredited)
Eve Eden
Spectator (uncredited)
