The Mouse That Roared

Grand Duchess Gloriana XII

Will Buckley

Doctor Alfred Kokintz

Benter

General Snippet (as Macdonald Parke)

United States Secretary of Defense

Roger

Cobbley (as Monty Landis)

Air Raid Warden

BBC Announcer

Pedro

Air Raid Warden (uncredited)

Ticket Collector (uncredited)

British Ambassador (uncredited)

French Ambassador (uncredited)

Soviet Ambassador (uncredited)

Army Captain (uncredited)

Mulligan (uncredited)

O'Hara (uncredited)

American General at the Pentagon (uncredited)

U.S. Policeman (uncredited)

Reporter (uncredited)

Cunard Captain (uncredited)

Cunard Second Officer (uncredited)

Telephone Operator (uncredited)

Bird Seller (uncredited)

The New York invasion sequence was filmed in Manhattan on a Sunday morning, accounting for the city's empty streets.

Grand Fenwick is ruled by Duchess Gloriana XII, said to be still in mourning for her consort "Leopold of Bosnia Herzegovina". The country of Bosnia and Herzegovina had not existed as an independent nation since 1918, and at the time of filming in 1959 was absorbed within the Republic of Yugoslavia, then under Communist rule. It is likely many people who saw the film thought the name was entirely fictitious. But 33 years after the film's release, Bosnia and Herzegovina was reconstituted as an independent sovereign nation in 1992, after the breakup of Yugoslavia.

The Grand Duchess' car is a 1913 Sunbeam 12/16.

The narrator tells us that the mock version of Grand Fenwick's wine drove the real wine out of the U.S. market in 1959. A news announcer later reports the score of the last game of the 1958 World Series.

The narrator says at the beginning that Grand Fenwick, sized at 15¾ square miles, is the smallest country in the world. Monaco and the Vatican are much smaller, so small, in fact, that even put together they are still much smaller than Grand Fenwick. Monaco itself is approximately 1 square mile. Even smaller is the Vatican, whose area is measured in mere acreage.

During the Institute for Physics scene, Professor Kokintz addresses Tully as both "Grand Marshall" and "Mr. Constable", but nowhere in the preceding dialogue is Tully introduced as such. Prof. Kokintz couldn't have known his two titles.

Tulley Bascombe: Men of Fenwick, where you hear the name of Grand Fenwick do your hearts swell with pride?

Tulley Bascombe: My girl, and my bomb!

Grand Duchess Gloriana: How did the war go?