* ExecutiveMeddling: Paramount left Leone alone during the actual production, but they cut over 20 minutes of the film for international distribution, including the entire tavern sequence and [[spoiler:Cheyenne's death]]. This accounted in large parts for the film's cool reception upon release. Nor would ''West'' be Leone's [[Film/OnceUponATimeInAmerica last brush with studio editors, either]].
* FakeAmerican: Jill is played by Claudia Cardinale and Morton by Gabriele Ferzetti (both Italian).
* PlayingAgainstType: Creator/HenryFonda plays the villain in this one, and a very vile one. Fonda had intended to radically change his usual appearance for the film, growing a mustache and beard and wearing brown contact lenses. Leone talked him out of it, as the shock of seeing good old Henry Fonda as a villain was exactly what he wanted. Ben Mankiewicz remarked on TCM that casting him as the villain hurt the box office, because viewers, especially Americans, thought he was too creepy.
* PromotedFanboy: Leone considered Creator/HenryFonda his favorite actor since childhood, and had asked him to appear in all of his previous works (supposedly, Fonda's agent wouldn't even show him the scripts, [[ItWillNeverCatchOn thinking them beneath his client]]).
* WhatCouldHaveBeen: Leone wanted Creator/ClintEastwood, Creator/LeeVanCleef and Eli Wallach- AKA Film/TheGoodTheBadAndTheUgly - to play the three gunmen in the opening scene, but Eastwood declined. Eastwood also turned down the role of Harmonica, as he was no longer interested in working with Leone.
* Eli Wallach, who had starred in ''Film/TheGoodTheBadAndTheUgly'' a couple of years prior, had played a part in persuading Henry Fonda to take up the chance to work with Leone on ''Film/OnceUponATimeInTheWest''.