Cast & crew
The Mouse That Roared (1959)
Directed by Jack Arnold Written by Roger MacDougall, Stanley Mann
Cast
| MacDonald Parke | General Snippet |
| 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 |
| Alan Gifford | Air Raid Warden |
| Austin Willis | United States Secretary of Defense |
| Timothy Bateson | Roger |
| Monte Landis | Cobbley |
| Colin Gordon | BBC Announcer |
| Harold Kasket | Pedro |
| Eve Eden | Spectator (uncredited) |
| Bill Edwards | Army Captain (uncredited) |
| Mabel Etherington | Ada - Lady in Waiting (uncredited) |
| Muriel Greenslade | Lady in Waiting (uncredited) |
| Guy Deghy | Soviet Ambassador (uncredited) |
| Juba Kennerley | Maybury (uncredited) |
| Fred Haggerty | Fenwickian (uncredited) |
| George Margo | O'Hara (uncredited) |
| Lionel Murton | American General at the Pentagon (uncredited) |
| Robert O'Neil | Reporter (uncredited) |
| Pat Ryan | American General (uncredited) |
| Stuart Saunders | Sergeant (uncredited) |
| Fred Stroud | Fenwickian (uncredited) |
| Bill Nagy | U.S. Policeman (uncredited) |
| John Tatum | American Admiral (uncredited) |
| Fred Wood | Bird Seller (uncredited) |
| Mavis Villiers | Telephone Operator (uncredited) |
Crew
| Austin Dempster | Camera Operator |
| James H. Ware | Production Manager |
| Maurice Binder | Title Designer |
| Geoffrey Drake | Art Direction |
| George Stephenson | Sound |
| Red Law | Sound |
| Philip Shipway | Assistant Director |
| Stuart Freeborn | Makeup Artist |
| Pamela Davies | Continuity |
| Richard Marden | Sound Editor |
| Leon Becker | Production Supervisor |
| Gerald Endler | Mechanical Designer |
| Jon Penington | Associate Producer |
| Raymond Poulton | Editor |
| Leonard Wibberley | Novel |
| John Winbolt | Second Unit Cinematographer |
| Anthony Mendleson | Costume Designer |
| Joyce James | Hairdresser |
| Edwin Astley | Conductor |
| Roger MacDougall | Screenplay |
| Jack Arnold | Director |
| Stanley Mann | Screenplay |
| Edwin Astley | Original Music Composer |
| John Wilcox | Director of Photography |
| Walter Shenson | Producer |