Trivia

The actors weren't given scripts but were given guidelines on how to behave or what to discuss in their scenes.

Steven Spielberg convinced the filmmakers to change the original ending.

Filming completed in 10 days.

Oren Peli shot the entire film with a home digital camera.

Steven Spielberg had to stop watching the film halfway through on a home screener as he was genuinely spooked by the experience. He completed it in daylight hours the next day and loved it.