- Blooper: The straps on Connie's nightgown as she and Edward start to make love are inconsistent.
- Dawson Casting: While a specific age is not given, we are led to believe that Olivier Martinez' character is much younger than Diane Lane (37 at the time of filming). Her husband is shocked at how young he is when he encounters him, and later blasts his cheating wife"you threw our life away for some fucking kid!". However, Martinez is only a year younger than Lane.
- Deleted Scene: Plenty, most of which just expand scenes already in the film.
- Connie putting Charlie to bed
- Connie and Paul meet on a train
- Connie receives a phone call from Paul. This can actually be seen in the film during the Falling-in-Love Montage, just without dialogue.
- Edward's camera catches Connie in a revealing moment
- Edward's escape from Paul's apartment.
- Edward prepares to dispose of Paul's body
- Connie and Edward go through their dinner party in a daze
- The police call Connie. Cue her and Edward's mutual Oh, Crap! reactions as they realize that the walls are closing in on them.
- A very tense Bait-and-Switch as they leave a party only to find a cop standing by their car. After a tense few moments, it turns out he was just giving them a ticket.
- Also an alternate ending that has Edward getting out of the car and walking into the police station.
- What Could Have Been:
- George Clooney, Johnny Depp, Robert Redford, John Travolta and Bruce Willis were offered the role of Edward.
- Brad Pitt and Ryan Phillippe were offered the role of Paul. However during pre-production, the producers decided that Paul be French rather than American, so Olivier Martinez received the part.
- Meg Ryan, Alyssa Milano (was forced to turn the role down due to her commitment to Charmed), Jodie Foster (she chose to star in Panic Room), Portia De Rossi, Kyra Sedgwick, Brooke Shields, Hilary Swank, Kate Winslet, Angelina Jolie, Jennifer Jason Leigh, and Jennifer Lopez were considered for the role of Connie.
- Edward and Connie's marriage was originally going to be unhappy, but director Adrian Lyne felt her adultery would be too easily explained if that were the case.
Trivia / Unfaithful