William Brent Bell is an American film director, screenwriter, and producer. He is best known for his work on horror films such as Stay Alive (2006), The Devil Inside (2012), Wer (2013), The Boy (2016), and Brahms: The Boy II (2019). Bell's first horror project was as co-writer and director of the horror thriller, Stay Alive, which was produced with McG McG and Peter Schlessel and financed by Spyglass Entertainment and Endgame Entertainment. Stay Alive was acquired and distributed domestically by Buena Vista Pictures and internationally by Universal Pictures. His second horror film was The Devil Inside, written with Matt Peterman. 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. The film topped the US box office on its opening weekend. It was a record-breaking commercial success and grossed over $100 million.

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