The Devil Inside is a 2012 American found footage supernatural horror film directed by William Brent Bell and written by Bell and Matthew Peterman. It is a documentary-style film about a woman who becomes involved in a series of exorcisms during her quest to determine what happened to her mother, a woman who murdered three people as a result of being possessed by a demon. Produced by Peterman and Morris Paulson, the film stars Fernanda Andrade, Simon Quarterman, Evan Helmuth, and Suzan Crowley, and was released theatrically on January 6, 2012.

Produced on a low budget, it was a commercial success and grossed over $101 million despite receiving poor reviews from critics and audiences. The film topped the US box office on its opening weekend, yet dropped drastically in the second week, before disappearing completely from the box office top ten.