Associated with the occult- this is a very brief summary
Is THE EXORCIST Cursed? Seven Reasons Why Some Think the Film is Haunted
The Curse of The Exorcist
7 of the Strangest and Unexplainable Film Curses
"Ellen Burstyn claimed that nine people were killed during the making of the film. Actor Jack MacGowran, who played Burke Dennings, died from a heart attack related to a case of the flu shortly after completing finishing his work on set. Vasiliki Maliaros, whose only role was in
The Exorcist, also died during post-production from “natural causes” at age 89. Actor Jason Miller’s toddler son was struck by a motorbike and killed during filming. Other deaths included Linda Blair’s grandfather, a night watchman, a special effects expert, and a cameraman’s newborn baby.
Mercedes McCambridge, the voice actress who played the demon that spoke through Regan, experienced a real-life horror movie of her own. In 1987, her son killed his wife and children, before turning the gun on himself.
An extra in the film, Paul Bateson, was a real life X-ray technician at NYU Medical Center where a scene was filmed, and played the same role as an extra. In 1979, Bateson was found guilty of the murder of a film critic Addison Verrill, whom he stabbed in the heart, and suspected of killing at least six other men and disposing of their bodies in plastic bags found washed up on the Hudson River. Bateson admitted to several killings. He killed one man by crushing his skull with a metal skillet.
Reports from the crew recall seeing objects move about on their own, most notably a telephone used to communicate on set that rose from the receiver and fell multiple times.
Due to eerily events and feelings all around,
Director William Friedkin asked religious advisor Reverend Thomas Bermingham to come on set and perform a real-life exorcism"