"The Blair Witch Project" is a 1999 American found footage psychological horror film written, directed, and edited by Daniel Myrick and Eduardo Sánchez. The film tells the fictional story of three student filmmakers (Heather Donahue, Michael C. Williams, and Joshua Leonard) who hike in the Black Hills near Burkittsville, Maryland, in 1994 to film a documentary about a local legend known as the Blair Witch. The three disappear, but their video and sound equipment (along with most of the footage they shot) is discovered a year later; the "recovered footage" is the film the viewer is watching.

The film premiered at the Sundance Film Festival on January 25, 1999, during which a promotional marketing campaign listed the actors as either "missing" or "deceased." The film had its United States release on July 14, 1999, and later expanded to a wider release starting on July 30. While it received generally positive reviews from critics, the film's audience reception was polarized. Nevertheless, the film was regarded to have popularized the found footage film technique. The film became a resounding box office success, grossing almost $250 million worldwide against an estimated budget of $60,000, making it one of the most successful independent films of all time. The film spawned two sequels:"Book of Shadows", which was released in October 2000, and "Blair Witch", released in September 2016.

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