When a Stranger Calls is a 2006 American psychological horror film directed by Simon West and written by Jake Wade Wall. The film stars Camilla Belle, Brian Geraghty, Katie Cassidy and Clark Gregg. Belle plays a babysitter who starts to receive threatening phone calls from an unidentified stranger, played by both Tommy Flanagan and Lance Henriksen. It is a remake of Fred Walton's 1979 film of the same name, which became a cult classic for its opening 23 minutes, which this remake extends to a feature-length film.

The film was theatrically released on February 3, 2006. It was panned by critics but was a moderate box office success, grossing $67.1 million worldwide on a $15 million budget.