Grand Duchess Gloriana XII / Prime Minister Count Rupert Mountjoy / Tully Bascombe
Helen Kokintz
Will Buckley
Professor Alfred Kokintz
Benter
General Snippet
United States Secretary of Defense
Roger
Cobbley
Air Raid Warden
BBC Announcer
Pedro
Soviet Ambassador (uncredited)
Spectator (uncredited)
Army Captain (uncredited)
Ada - Lady in Waiting (uncredited)
Lady in Waiting (uncredited)
Fenwickian (uncredited)
Maybury (uncredited)
O'Hara (uncredited)
American General at the Pentagon (uncredited)
U.S. Policeman (uncredited)
Reporter (uncredited)
American General (uncredited)
Sergeant (uncredited)
Fenwickian (uncredited)
American Admiral (uncredited)
Telephone Operator (uncredited)
Bird Seller (uncredited)