- Joe's narration for the scene of him paging through Norma's script:
Sometimes it's interesting to see just how bad bad writing can be. This promised to go the limit.
- Joe's expression of disbelief in astrology, when Norma claims the stars foretell Cecil B. DeMille greenlighting her return:
Norma: Here's the chart from my astrologer. She read DeMille's horoscope. She read mine.
Joe: She read the script?
- Norma's Charlie Chaplin impression is actually amusing. (Gloria Swanson was friends with Charlie Chaplin in real life.) At least until Max interrupts.
- A grim joke during the final scene, but the police are unable to use the phones because gossip columnist Hedda Hopper is calling in her report.
- When Joe is getting another of his scripts rejected, he tells the script girl "You'd have turned down 'Gone with the Wind'," only to have the producer sitting next to her reply "No, that was me. I said 'Who wants to see a Civil War picture?'"
- When Norma visits Paramount Studios, she's shown to a seat to watch the shoot. When she sits down, she notices a microphone nearby and shoves it away.
Funny / Sunset Boulevard
Billy Wilder and Charles Brackett originally envisioned this movie as a comedy, and while the final product turned out more dramatic than intended, it still works in a few humorous lines.