Directed by: Rob Reiner
Starring: Meg Ryan, Billy Crystal, Carrie Fisher, Bruno Kirby
Revealing mistake: In the scene where they have just had sex, Meg goes to get out of the bed and is supposed to be naked, but when she puts on the bathrobe you can see she is wearing some type of slip or nylon panties.
Revealing mistake: During the Lake Shore Drive scene, during the late 1970's, check the model years of the passing cars. There's at least one Ford Taurus which did not debut until the 1984 model year.
Factual error: When Harry and Sally are driving away from the University of Chicago at the start of their road trip there is a long shot of them driving on Lake Shore Drive, but they are heading south towards the city with the lake on their left. If they were leaving the city from UofC, which is in Hyde Park, they would already be driving away from the city on Lake Shore Drive.
Harry Burns: How long do you like to be held after sex? All night, right? See, that's your problem. Somewhere between 30 seconds and all night is your problem.
Sally Albright: I don't have a problem.
Harry Burns: Yes, you do.
Trivia: When they are in the museum and Harry says "For the rest of the day, we are going to talk like this...", the last thing he says is ad libbed. "But I would be proud to partake of your pecan pie." is not in the script. You can see Meg Ryan look off-camera at the director and say "Oh, no" but she continues with him. It's obvious that she wasn't expecting it. [This is confirmed as true in the documentary on the DVD.]