While Stephen King’s debut novel Carrie was turned into a highly successful adaptation by director Brian De Palma, one of the movie’s best decisions was a fortunate mistake by an actor. Stephen King has played an outsized role in the history of modern horror, and his influence is so vast that it is tough to remember a time when he was an unknown young author. However, in 1974, publishers took a big chance on King when they offered the writer a huge advance for his debut novel, Carrie. King got lucky once again when director Brian De Palma was hired to adapt Carrie as a film a year later.
https://screenrant.com/stephen-king-carrie-movie-piper-laurie-acting-mistake/