For the scene in which Jack breaks down the bathroom door, the props department built a door that could be easily broken. However, Jack Nicholson had worked as a volunteer fire marshal and tore it apart far too easily. The props department were then forced to build a stronger door.
According to Shelley Duvall the infamous ‘Heere’s Johnny!’ scene took 3 days to film and the use of 60 doors.
There were so many changes to the script during shooting that Jack Nicholson claimed he stopped reading it. He would read only the new pages that were given to him each day.
Stephen King, the author of the book on which the movie was based, was quite disappointed in the final film. While admitting that Stanley Kubrick’s visuals were stunning, he said that was surface and not substance. He often described the film as “A fancy car without an engine.
Shelley Duvall suffered from nervous exhaustion throughout filming, including physical illness and hair loss.
The idea for Danny Lloyd to move his finger when he was talking as Tony was his own; he did it spontaneously during his very first audition.
Jack Nicholson ad-libbed the “little pigs” dialog towards the end of the film. He also ad-libbed the famous line, “Here’s Johnny”.
Every time Jack talks to a “ghost”, there’s a mirror in the scene, except in the food locker scene. This is because he talks to (an unseen) Grady through a shiny metal door.
To get Jack Nicholson in the right agitated mood, he was only fed cheese sandwiches – which he hates.
Jack tells Lloyd in the bar that Danny once messed around with his work papers. This mirrors an event in Stephen King’s life, when his son once started playing around with his writing notes. He felt like killing him.