- Richard Harris decided to play the principal of the magic school because his granddaughter threatened to never speak to him.
- When the crew prepared to shoot at Gloucester Church, many people protested to the local newspaper, saying that the filming would desecrate the church and planned to stop the filming.
- The inscription around the magic mirror says "Erised stra ehru oyt ube cafru oyt on wohsi", which means "I show not your face but your heart's desire". The word "bloody" appeared 6 times in the film.
- Robin Williams and Rosie O'Donnell both asked to play roles in the film for free, but the two ultimately failed to do so. Tim Rose was once a strong contender to play Professor Snape but he later withdrew to star in "Delta Planet".
- Rowling personally selected Alan Rickman and Robbie Kotrani.
- The interior of Gringotts was shot at the Australian Embassy in London.
- Gabriel Thomson was once the candidate to play Harry Potter. David Huris, who played Professor Lupin in "Harry Potter and the Prisoner of Azkaban", was once the candidate to play Professor Quirrell.
- According to Steven Spielberg, Jonathan Demi, Brad Sebernin and Terry Gilliam were all candidates for the film's director. Alan Parker was also the film director candidate.
Harry Potter and the Sorcerer's Stone behind the scenes gags
Harry Potter and the Sorcerer's Stone quotes
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Harry: Hagrid, who gave you the Dragon Egg? What did he look like?
Hagrid: I don't know. I never saw his face. He kept his hood up.
Harry: This stranger, though, you and he must've talked.
Hagrid: Well, he wanted to know what sort of creatures I looked after. I told him. I said "After Fluffy, a dragon's gonna be no problem."
Harry: Did he seem interested in Fluffy?
Hagrid: Well, of course he was interested in Fluffy. How often do you come across a 3-headed dog, even if you're in the trade? But I told him I said - I said, "The trick with any beast is to know how to calm him." Take Fluffy, for example, just play him a bit of music and he falls straight asleep.
Hagrid: [pause] I shouldn't have told you that.
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Hagrid: See Harry, you're famous.
Harry: But why am I famous, Hagrid? All those people back there, how is it they know who I am?
Hagrid: I'm not sure I'm exactly the right person to tell you that, Harry.