What Lies Beneath is a 2000 motion picture that tells the story of a housewife who finds her home is haunted.

The film is directed by Robert Zemeckis and stars Harrison Ford, Michelle Pfeiffer, Diana Scarwid, Miranda Otto, James Remar, Joe Morton, Ray Baker and Wendy Crewson.

Claire Spencer (Pfeiffer) enters a new phase of her life after her daughter leaves home. With her husband, renowned scientist Norman (Ford), Claire is now living in a remodelled lakeside home in Vermont that once belonged to Norman's scientist father. However, when Claire meets her new neighbour Mary (Otto), she learns how terrified Mary is of her husband Warren (Remar). And when Mary suddenly disappears, clues lead Claire to suspect that she was murdered by her husband.

So when strange events start occurring in her house, Claire is certain that Mary's ghost is haunting her. But as the events get more and more mysterious, and Mary then turns up alive, Claire is forced to probe the events of Norman's past in order to learn who is really haunting them, and how to put the ghost to rest.

The film features many references and homages to Alfred Hitchcock films, notably Psycho and Rear Window. An example is the final shot, which fades out from a graveyard to show a woman's face, just as the final shot of Psycho does. Roger Ebert noted in his review one of the glaring errors in the film is directing a Hitchcockian film and involving the supernatural, something Hitchcock never did. In the Rosemary's Baby DVD featurette, it's mentioned the film was offered to Hitchcock, and he declined because it involved the supernatural.

Budgeted at over $90,000,000, What Lies Beneath was released on July 21, 2000 and was met with mixed reviews. However, it opened #1 at the box office, grossing just under $30 million. It continued strongly throughout the summer of 2000, and ended up grossing over $155 million in the United States, and nearly $300 million worldwide.