The Mirror Crack'd is a 1980 British mystery film directed by Guy Hamilton from a screenplay by Jonathan Hales and Barry Sandler, based on Agatha Christie's Miss Marple novel The Mirror Crack'd from Side to Side (1962). It stars Angela Lansbury, Geraldine Chaplin, Tony Curtis, Edward Fox, Rock Hudson, Kim Novak, and Elizabeth Taylor. Scenes were filmed at Twickenham Film Studios in Twickenham, Middlesex, and on location in Kent.

In 1953, in the English village of St Mary Mead, the home of Miss Jane Marple, a Hollywood production company arrives to film a costume drama about Mary, Queen of Scots and Elizabeth I with two rival famous movie stars, Marina Rudd and Lola Brewster. Marina is making a much-heralded comeback after a prolonged illness and retirement (due to a mental health crisis after her son was born with severe brain damage). She and her husband, Jason Rudd, the film's director, arrive with their entourage. Learning that Lola will be in the film as well, Marina vents her anger. Lola then arrives with her husband, Marty Fenn, the film's producer.

Excitement runs high as the villagers attend the village fête in the gardens of the local manor house, Gossington Hall, and with the organisers invited to meet the celebrities at an indoor reception held by the film company. Lola and Marina come face to face at the reception and exchange insults as they pose for the cameras.

At the reception Marina is cornered by a devoted fan, Heather Babcock, who bores her with a detailed story about having met Marina before during the Second World War. After recounting that meeting, when she arose from her sickbed to go and meet the glamorous star, Heather drinks a cocktail made for Marina, but quickly dies. An autopsy attributes the death to poisoning via a barbiturate overdose.

Everyone is certain Marina was the intended murder victim. She has received anonymous death threats made up from newspaper clippings and her cup of coffee on the film set, which she refuses to drink, is found to have been spiked with arsenic, sending her into fits of terror.

The detective from Scotland Yard investigating the case, Inspector Craddock, is baffled. He asks his aunt, who happens to be Jane Marple, for help. She injured her foot at the village fête and is confined to her home. The suspects are Ella Zielinsky, Jason's assistant who is secretly in love with him and would like Marina out of the way, and the hotheaded actress Lola.

The main suspect, Zielinsky, calls and threatens to expose the murderer from a telephone box in the village. She is then killed by a lethal nasal spray substituted for her hay-fever medication. An autopsy reveals that it contained prussic acid.

Miss Marple, now back on her feet, visits Gossington Hall, where Marina and Jason are staying, and views where Heather's death occurred. Working from information received from her cleaning woman, Cherry Baker, who was a waitress on the day of the murder, Marple begins to piece together the events and solves the mystery. By that time, however, another death has occurred at Gossington Hall, which explains who the killer was: Marina Rudd, who has apparently died by suicide.