Sissy Spacek and Piper Laurie were the first people to be nominated for Oscars roles in a horror movie Which one?

You're close! While both Sissy Spacek and Piper Laurie were nominated for Oscars in horror films, they were not the *first* to achieve this.

The first people to be nominated for Oscars in roles in horror films were:

* Bette Davis for "Whatever Happened to Baby Jane?" (1962) - Nominated for Best Actress

* Joan Crawford for "Whatever Happened to Baby Jane?" (1962) - Nominated for Best Actress

Both actresses were nominated for their roles in the psychological horror film "Whatever Happened to Baby Jane?".