Trivia: Director Brian de Palma originally wanted Sissy Spacek to play Chris Hargenson (now portrayed by Nancy Allen). But Spacek wanted to be the star, so she showed up for her audition in a dress her mother made for her in 7th grade. She looked so awkward and hopelessly out of touch with fashion that De Palma cast her as Carrie.
Trivia: In a deleted scene, Carrie causes small rocks to rain from the sky. Huge boulders were supposed to rain at the end of the film when the house collapsed, but the machine that sprayed them jammed. So the filmmakers decided to just burned the house down instead. However, they had already filmed the indoor shots with the rocks coming through. But somehow they got away with it.