- Cameos by Frank Sinatra, Sophia Loren, and Barbra Streisand were planned.
- When Mata Bond swings into action, the background music is "Bond Street".
- Peter Sellers and Orson Welles hated each other so much that the filming of the scene where both of them face each other across a gaming table actually took place on different days with a double standing in for one the actors.
- Sellers often caused interruptions by leaving the set for days at a time.
- Numerous screenwriters and directors contributed bits to the film and were uncredited: Billy Wilder (the "Nobody's Perfect" tag line) and Terry Southern (the war room in Berlin) among them.
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