!!The movie
* BannedInChina: Upon its original release, Kansas banned the film from being shown in the state, explaining that cross-dressing was "too disturbing for Kansans".
* CaliforniaDoubling: For Florida.
* CompletelyDifferentTitle: In Soviet Union, the film was released as "V dzhaze tolko devushki," literally "In Jazz, There Are Only Girls," or poetically and figuratively "Only Girls Are Allowed In Jazz", thought by some to be a much more appropriate title.
* CutSong: Creator/MarilynMonroe recorded a vocal version for the theme to the film. It was to be played over the opening credits, but an instrumental overture took its place in the final version. The title track later appeared on an LP in the mid-'70s, with Marilyn's three other songs from the film.
* DeletedScene: The lack of audience laughter during the first test screening prompted Creator/BillyWilder to shorten the train ride from Chicago to Miami by 60 seconds. First, he trimmed the conversation Sugar and Josephine share in the bathroom: originally, Sugar told Josephine that she has trouble falling asleep in the berth above a snoring Beinstock, so she and Josephine agree to trade berths with each other. Next, he removed the payoff of this trade: Daphne mistakes a sleeping Josephine for Sugar, and grabs "her" while admitting that he's really a man. Joe/Josephine threatens to punch Jerry/Daphne, but the latter asks, "You [[WouldntHitAGirl wouldn't hit a girl]], would you?" With the pacing increased, the movie met nonstop laughter at its next test screening.
* HideYourPregnancy: Creator/MarilynMonroe was pregnant during the filming, as a result she looked considerably heavier. Most of the publicity still photos were posed for by both Sandra Warner (who had an uncredited role as one of the band members) and Monroe's frequent stand-in Evelyn Moriarty with Monroe's head superimposed later.
* LoopingLines: Creator/TonyCurtis' dialogue when he was dressed up as a female was dubbed by Creator/PaulFrees since Curtis had too deep of a voice to do a proper falsetto. He did attempt it during filming though, and one or two of his quick lines slipped through. Notably, Frees also had a small on-camera part as the owner of a speakeasy.
* MoneyDearBoy: Marilyn Monroe agreed to do the film when she was promised 10% of the gross. She was apparently reluctant to take the part because she didn't want to play someone [[PaperThinDisguise who couldn't tell two men were in drag]].
* OneTakeWonder: Creator/MarilynMonroe was notorious about insisting on multiple takes (the "where's that bourbon" line took ''eighty-one'' takes before she was happy). But for the upper berth bed scene, they did the whole thing in one take and at the end Marilyn said "I loved it too" - shocking everyone.
* PermanentPlaceholder: Wilder and IAL Diamond first wrote "Well, nobody's perfect!" as a "dummy line", intending to replace it with something funnier before the shoot, but they couldn't think of a worthy replacement.
* RecycledTheSeries: A pilot for a prospective TV adaptation, starring Vic Damone and [[Series/GilligansIsland Tina Louise]] (and featuring Curtis and Lemmon in a cameo), was shot in 1961 but wasn't broadcast.
* TroubledProduction: Creator/MarilynMonroe infamously had to do endless takes for many of her lines and was often late on set, generally ascribed to a combination of nervousness, perfectionism (not helped by the fact that her acting coach Paula Strausberg was always on set), and the ill effects of mixing alcohol and pills. Creator/TonyCurtis got so annoyed by this that after an early screening of the film when asked what it was like to kiss Marilyn Monroe, he supposedly said it was "like kissing Hitler." (Curtis went back and forth in later interviews as to whether or not he actually said this).
* WhatCouldHaveBeen:
** Creator/MarilynMonroe wanted the movie to be shot in color (her contract stipulated that all her films were to be in color), but Creator/BillyWilder convinced her to let it be shot in black and white when costume tests revealed that the makeup that Creator/TonyCurtis and Creator/JackLemmon wore gave their faces a green tinge. Billy Wilder also thought black and white film gave the movie more of a Twenties atmosphere; Wilder preferred shooting in black and white in general throughout his career, continuing to do so as late as ''1966'' (''The Fortune Cookie'')[[note]]which was also the last year that Oscars were given out specifically for black-and-white movies[[/note]] - tellingly, the last black and white film to win Best Picture before the DeliberatelyMonochrome ''Film/SchindlersList'' and ''Film/TheArtist'' was his ''Film/TheApartment''.
** Creator/JerryLewis was offered the role of Jerry/Daphne but declined because he didn't want to dress in drag. When Lemmon received an Oscar nomination for the role that Lewis gave up, Lewis claims he sent him chocolates every year to thank him and now regrets not taking the part.
** Wilder considered Creator/FrankSinatra for Jerry/Daphne. Creator/AnthonyPerkins auditioned.
** Creator/BobHope and Creator/DannyKaye were considered for the lead roles, while Mitzi Gaynor was originally considered for the role of Sugar.
** The role of Little Bonapart was originally offered to Creator/EdwardGRobinson, but he had vowed never again to work with George Raft, with whom he had a fist fight on the set of ''Manpower'' in 1941 when for a scene Raft spun him around too hard. (Despite the avowal, Robinson did co-star with Raft in ''A Bullet for Joey'' in 1955). However, the role of Johnny Paradise, the kid homaging Raft's "cheap trick" of coin-flipping, is also the man with the Tommy gun in the birthday cake who mows down Spats and his gang. The actor is Edward G. Robinson Jr.
* WorkingTitle: ''Not Tonight, Josephine''.
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* This is one of the films on the Creator/RogerEbert Great Movies List.
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!!The 2022 musical
* QueerCharacterQueerActor: In the original Broadway production, non-binary J. Harrison Ghee originated the role of Jerry/Daphne, [[spoiler:who adopts a genderfluid identity by the end of the show]]. They went on to become the first non-binary winner of the Tony Award for Best Leading Actor in a Musical.