* FakeAmerican: Jill is played by Claudia Cardinale and Morton by Gabriele Ferzetti (both Italian).
* HeyItsThatGuy: Morton is [[OnHerMajestysSecretService James Bond's father-in-law]] and Knuckles [[TheGoodTheBadAndTheUgly learnt to shoot, not talk]].
* 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.