During production of The Poltergeist movies a total of four cast members died during and soon after the filming of the series.
Heather O’Rourke (Carol Anne) was misdiagnosed with Crohn’s Disease in 1987. The following year, O’Rourke fell ill again, and her symptoms were casually attributed to the flu. A day later, she collapsed and suffered a cardiac arrest.
Dominique Dunn who played the older sister was strangled and left for dead in her Hollywood home’s driveway after not taking her estranged partner back into a relationship.
The evil preacher Kane who appeared in the sequel died of stomach cancer.
The same film was met with further tragedy, after Will Sampson, who played Taylor the Native American shaman, died after undergoing a heart-lung transplant, which had a very slim survival rate. Sampson, the real-life medicine man, also performed an authentic exorcism after shooting wrapped up one night prior to his death.