Trivia: In the 40th anniversary re-mastered edition they have used Audrey Hepburn's original singing track for the "Wouldn't it be lovely" song.
Trivia: Kubrick originally wanted to make this a serious drama. During the screenwriting process he was confronted again and again with situations that were completely truthful and serious, yet he was afraid and audience would laugh at how absurd it is. Such as general Turgeson referring to general Ripper's sending an entire bomb wing to obliterate Russia as "Overextending his authority". He eventually figured out that the only way to write it would be as a comedy.
Trivia: Vintage aircraft fans do not hold this film in very high regard. During filming a perfectly serviceable Mosquito was wrecked deliberately for a crash scene. Considering the scarcity of flying Mossies it's considered almost a criminal act in the vintage aviation world.
Trivia: Chief Mangosuthu Buthelezi, who played King Cetewayo in the film is actually a real-life distant descendant of the very same Zulu king he was playing. Small wonder the producers decided to choose him to play Cetewayo.
Trivia: This is the movie that officially kicked off the Showa kaiju cinematic universe.
Trivia: The reconstruction of the Roman Forum at Las Matas for this film holds the record for the largest outdoor film set ever constructed. The various ancient Rome settings covered 55 acres.
Trivia: Bette Davis was only nine years older than her on-screen daughter Susan Hayward.