cast
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Peter Sellers
Grand Duchess Gloriana XII / Prime Minister Count Rupert Mountjoy / Tully Bascombe
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Jean Seberg
Helen Kokintz
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William Hartnell
Will Buckley
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David Kossoff
Professor Alfred Kokintz
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Leo McKern
Benter
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MacDonald Parke
General Snippet
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Austin Willis
United States Secretary of Defense
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Timothy Bateson
Roger
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Monte Landis
Cobbley
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Alan Gifford
Air Raid Warden
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Colin Gordon
BBC Announcer
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Harold Kasket
Pedro
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Guy Deghy
Soviet Ambassador (uncredited)
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Eve Eden
Spectator (uncredited)
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Bill Edwards
Army Captain (uncredited)
- Mabel Etherington Ada - Lady in Waiting (uncredited)
- Muriel Greenslade Lady in Waiting (uncredited)
- Fred Haggerty Fenwickian (uncredited)
- Juba Kennerley Maybury (uncredited)
- George Margo O'Hara (uncredited)
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Lionel Murton
American General at the Pentagon (uncredited)
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Bill Nagy
U.S. Policeman (uncredited)
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Robert O'Neil
Reporter (uncredited)
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Pat Ryan
American General (uncredited)
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Stuart Saunders
Sergeant (uncredited)
- Fred Stroud Fenwickian (uncredited)
- John Tatum American Admiral (uncredited)
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Mavis Villiers
Telephone Operator (uncredited)
- Fred Wood Bird Seller (uncredited)