as Grand Duchess Gloriana XII / Prime Minister Count Rupert Mountjoy / Tully Bascombe

as Helen Kokintz

as Will Buckley

as Professor Alfred Kokintz

as Benter

as General Snippet

as United States Secretary of Defense

as Roger

as Cobbley

as Air Raid Warden

as BBC Announcer

as Pedro

as Soviet Ambassador (uncredited)

as Spectator (uncredited)

as Army Captain (uncredited)

as Ada - Lady in Waiting (uncredited)

as Lady in Waiting (uncredited)

as Fenwickian (uncredited)

as Maybury (uncredited)

as O'Hara (uncredited)

as American General at the Pentagon (uncredited)

as U.S. Policeman (uncredited)

as Reporter (uncredited)

as American General (uncredited)

as Sergeant (uncredited)

as Fenwickian (uncredited)

as American Admiral (uncredited)

as Telephone Operator (uncredited)

as Bird Seller (uncredited)