- Adaptation Displacement: Based on a novel by Howard Fast. Guess which one's better-remembered today.
- Ensemble Darkhorse: Woody Strode's Draba appears in the film's first half and serves as a trigger for the Rebellion, but he's such an incredible presence and gives a powerful performance that he became one of the most well liked figures in the film. He got nominated for Best Supporting Actor at the Golden Globes.
- Foe Yay: Crassus.
"I don't want glory, I want Spartacus."
- Written by Cast Member: Charles Laughton hated the Dalton Trumbo-written dialogue he was initially given, so Peter Ustinov rewrote all of the scenes featuring Batiatus and Gracchus together, which placated Laughton enough to complete his portion of the film.