- 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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Ron: [Harry and Ron arrive late to Transfiguration, relieved that Professor McGonagall isn't there yet] Whew, made it. Can you imagine the look on old McGonagall's face if we were late?
[the cat sitting at the head of the class suddenly transforms into her]
Ron: That was bloody brilliant!
Professor McGonagall: Well, thank you for that assessment, Mr Weasley. Perhaps it would be more useful if I were to transfigure Mr Potter and yourself into a pocket watch? That way, one of you might be on time.
Harry: We got lost.
Professor McGonagall: Then perhaps a map? I trust you don't need one to find your seats.
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Ron: What do they think they're doing, keeping a thing like that locked up in a school?
Hermione: You don't use your eyes, do you? Didn't you see what it was standing on?
Ron: I wasn't looking at its feet! I was a bit preoccupied with its heads... or maybe you didn't notice? There were three!