- Actor Allusion: The Seinfeldian Conversation mentioned below is likely a reference to Jason Alexander's role as George Costanza.
- Money, Dear Boy:
- Old Shame: Gwyneth Paltrow has stated that she didn't care much for this film. Jack Black has stated that he signed onto it because he wanted to make a film with the Farrelly Brothers, but it wasn't what he expected it to be, which made him feel like he sold out.
- What Could Have Been: The Farrely Brothers' first choice for Hal was Tom Cruise. The second choice was Ben Stiller.
Trivia / Shallow Hal