The bird-shaped cane that Cassidy grabs for a weapon in one scene is an homage to The House on Sorority Row (1982), as it's the same style cane that Mrs. Slater carries in that film.
The movie was originally intended to be R-rated, but after the success of 2008's Prom Night (2008) remake, Summit Entertainment planned to trim it to a PG-13 rating. However, the studio changed its mind, and decided to keep the movie as a solid R-rated movie.
Several of the music tracks used for background during dialog are used in the video game "Sims 3" when the Sims' stereo is set to "Custom".
The frat boy who drunkly declares himself a "sea pig" is directly referencing the original film, wherein a student jumps into the sorority swimming pool and declares the same.
Leah Pipes originally read for the part of Ellie. After auditioning for Ellie, she auditioned for the part of Jessica. After a second audition for the role of Jessica, as well as a makeover of hair extensions and a wardrobe change, she was given the part.