In the first scene in Max's office, there is a calendar showing the date as June 16. Leopold Bloom is a character in James Joyce's Ulysses, which recounts the events of a single day. June 16th.

When Ulla first enters the office, watch the eyes on the Funny Boy poster. They move.

Mel Brooks "composed" the music for the Broadway show (which would go on to become this movie) by humming tunes into a tape recorder. Someone who was musically literate would then write it down on staff paper.

Susan Stroman, the director of this movie, was the choreographer in the stage version. She won a Tony award for her efforts.

In this movie, Matthew Broderick says to Nathan Lane "Oh how I hate you!" and he replies "Double! Double!". In the movie Mouse Hunt, Lars says to Ernie "I hate you!" and Ernie (played by Nathan Lane) gives the same response. Both characters even say it in the same style.

After Along Came Bialy, Max goes into the safe and says "Hello boys" and later Leo is looking at the papers saying "work, work, work, work" that is referring to a scene from Blazing Saddles when the Mayor (Mel Brooks) is signing contracts and says "work, work, work, work, hello boys have a good night rest I missed you"

Out of all the girls wearing pearls and the old ladies, only two of them were in the broadway show.

The guy in the cab who says "Where to?" is Brad Oscar the man who played Frans Liebkin in the play with Nathan Lane and Matthew Brodrick who now plays Max Bialystock on the Off-Broadway The Producers.

Before Hans the Nazi sells Bialastock and Bloom his script, he first makes them take the "Zigfried oath." Zigfried was Maxwell Smart's main adversary in "Get Smart," the 1960's TV show created and written by Mel Brooks.

Stay 'till the end of the credits for a last musical number entitled "Goodbye".

The "Beautiful Girls wearing nothing but pearls" are actually wearing 20 pounds of nothing but pearls.