Trivia: During "Springtime for Hitler," film director Mel Brooks can be heard saying "Don't be stupid, be a smarty! Come and join the Nazi party!" He later dubbed the same line in the 2005 version.
Trivia: The film inspired a 2000 Broadway musical, with Nathan Lane and Matthew Broderick as Max Bialystock and Leo Bloom, respectively. The musical won 12 Tony Awards. The musical was later adapted into a film, becoming a movie based on a musical based on a movie about a musical.
Trivia: When scripting "The Producers", Mel Brooks deliberately chose the name Leopold Bloom (aka "Leo Bloom") for the accountant character, the role played by Gene Wilder, because it was the name of the Irish Jew who is the central character of James Joyce's novel "Ulysses."
Trivia: Although Mel Brooks wrote the film's musical numbers, he isn't music literate. He hummed the songs into a tape recorder, and the music was transcribed by a professional musician.