* TheDanza: Marcello Mastroianni as Marcello Rubini, Riccardo Garrone as Riccardo.
* NoExportForYou: The film wasn't released in Spain until 1981 because of moral censorship.
** Dino De Laurentiis wanted Creator/PaulNewman for Marcello Rubini, but Creator/FedericoFellini wouldn't hear of it. Fellini did consider Creator/BurtLancaster.
** De Laurentiis wanted Creator/BarbaraStanwyck for Nadia.
** Fellini originally wanted Creator/HenryFonda for Steiner.
** A scene was mooted that involved Marcello's relationship with an older writer, Dolores, to be played by Oscar winning actress Luise Rainer. After much protracted discussions and difficulties, due to Luise Rainer's wish to rewrite her role somewhat, Federico Fellini cancelled the scene altogether. The actress was furious, reportedly saying, "I have spoiled a priceless piece of cloth on this character that will never be!"
* WriteWhoYouKnow: Steiner was based on the Italian author and intellectual Cesare Pavese whom one of the screenwriters went to school with [[spoiler:and who equally committed suicide]].