Irwin Allen managed to assemble his all-star cast by promising them they would only be filming for one day and that they would get paid $25,000 for doing so.
When asked if the film was based on a book, Ronald Colman replied, "Yes. But they are using only the notes on the dust jacket."
The film uses a great deal of stock footage from earlier movies, including Land of the Pharaohs (1955) and Helen of Troy (1956).
Since this is Harpo Marx's only color feature, it's the one movie in which audience members get to see that his wig was red, not blonde.