Barrymore could've starred in the film, but instead took a bit part as Casey, the girl at the beginning of the film who is murdered first. She did so because she was sick of the horror movie cliché of the "final girl" you know is going to survive the whole film. "What I wanted to do is to take that comfort zone away. ... I asked if I could be Casey Becker, so we would establish this rule does not apply in this film.”