In 1974, Time magazine researchers learned, and informed Jack Nicholson (30 at that time), that his sister was actually his mother, and his mother was his grandmother.
In his famous scene in ‘The Shining’, the crew made a fake door for Jack Nicholson to break through, but had to replace it with a real door as the fake one broke too quickly due to Jack previously being a Fire Marshall.
Jack Nicholson was raised by his grandparents while his birth mother, June Nicholson, pretended to be his sister. He only found out who his real mother was when he turned 37.
Simon Cowell briefly worked as a runner in Stanley Kubrick’s The Shining. He polished Jack Nicholson’s axe.
It wasn’t until he was 37 when Jack Nicholson found out that his supposed “sister”, June, was actually his mother.
In the iconic door-smashing scene in The Shining, Kubrick originally had a prop door in place. Jack Nicholson, who had worked as a volunteer fire marshal, got through it too quickly, so it was replaced with a real door. Nicholson was Kubrick’s first choice for the role of Jack Torrance; other actors considered were Robert De Niro (who claims the film gave him nightmares for a month), Robin Williams and Harrison Ford, all of whom met with Stephen King’s disapproval.
Hunter S. Thompson appeared outside Jack Nicholson’s home on the night of Nicholson’s birthday. He set off a high-powered spotlight and gunfire and played a tape of animal cries through an amplifier to awaken him. Thompson then left a freshly-cut elk’s heart on Nicholson’s door as a joke.