The idea that the cast was in some way "cursed" is a superstition based on these facts: four of the stars of the movie died deaths that can be characterized by the credulous as mysterious or tragic. It is not clear that this particular film actually differs from others in the number or nature of the deaths of those who acted in it.
The movie made its stars instant famous teen idols, but some of the main actors who participated in it started dying shortly afterwards, making some people suggest the notion of a 'cursed movie'.
Those who believe in the curse point to these four deaths:
Some other movies and television series have been dubbed as cursed over the years. One of them, The Conqueror, starring John Wayne, has a stronger claim than most others for a "curse". Shot in St. George, Utah, the movie location was downwind of Nevadan open-air nuclear testing. Several cast members, including Wayne, eventually died of cancer. Radiation exposure, however, while unhealthy, is not a curse.
See also: Poltergeist curse.