** At one point Lucky Day has to recite a magic phrase consisting of gibberish. The last two syllables are "Hoff-HARR", which is how you pronounce the last name of Creator/SteveMartin's character in ''Film/TheManWithTwoBrains''.
** The injury that Martin gets from the first gunshot wound, is in his left arm, in the same spot he kept getting shot in ''Film/DeadMenDontWearPlaid''.
* TheCastShowoff: Creator/SteveMartin learned the lasso tricks while working in a magic shop at Disneyland as a teenager.
* CreatorBacklash: In his memoir, ''Life Itself'', Creator/RogerEbert recounted appearing as a guest on ''Series/TheTonightShow'' alongside Creator/ChevyChase who was promoting the film. During the interview, Ebert was asked what his least favorite film of the holiday season was, he replied ''Three Amigos''. Chase said "looking forward to your next picture", but later confided with Ebert backstage that he didn't "think it's so hot, either."
* DeletedRole: Creator/SamKinison had a role as a Mexican bandit and stalker that was filmed and later cut from the film. There was also a deleted subplot involving Creator/FranDrescher as rival actress Miss Rene.
* ExecutiveMeddling: Creator/JohnLandis said in an Empire magazine piece on the film that it was taken out of his hands in post-production by the studio, and heavily edited. It had its first scene cut for instance.
* StarringAStarAsAStar: Comedy stars Creator/SteveMartin, Creator/MartinShort, and Creator/ChevyChase play silent film western stars Lucky Day, Ned Nederlander, and Dusty Bottoms.
* VindicatedByCable: The film was only a modest money-earner and received mixed reviews on release. Today it's more fondly regarded by fans of 80's comedies, thanks to plenty of repeat showings on HBO, and eventually earned a spot on Bravo's "100 Funniest Movies" list.
** Creator/StevenSpielberg considered directing the film, but chose to do Film/ETTheExtraTerrestrial'' instead. He has said in interviews, his choices for the roles of the Three Amigos were Creator/SteveMartin for Lucky Day, Creator/BillMurray for Dusty Bottoms, and Creator/RobinWilliams for Ned Nederlander.
** Originally, Martin'S costars were Creator/DanAykroyd, and Creator/JohnBelushi. Martin mentioned it in a Playboy interview published in January 1980, referring to the movie as ''The Three Caballeros''.
** Had Creator/MartinShort not been available, his role would have gone to Creator/RickMoranis.