* ActingForTwo: Creator/PeterSellers plays three different roles in the film. Lampshaded by the film itself, with the joke that the founder of Grand Fenwick was, in every possible sense, the "father of his country."
* TheOtherDarrin: Sellers did not return for ''The Mouse on the Moon'' so his roles of the Duchess and Prime Minister were played by Creator/MargaretRutherford and Creator/RonMoody respectively.
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