(right) in the television film
The Day the Loving Stopped (1981). Dunne's first role was in the 1979 television film,
Diary of a Teenage Hitchhiker. She then got supporting roles in episodes of popular 1980s television series, such as
Lou Grant,
Family,
Hart to Hart, and
Fame. Dunne also had a recurring role on the comedy-drama television series,
Breaking Away, and she also appeared in several other television films. After her television appearances, in 1981, Dunne was cast in the
supernatural horror film Poltergeist in the main role of
Dana Freeling, the teenaged daughter of a couple whose family is terrorized by malevolent ghosts. The film was produced by
Steven Spielberg and directed by
Tobe Hooper, and served as her feature film debut.
Poltergeist was theatrically released in 1982, which marks both her first starring role and her only appearance in a theatrical feature. It went on to become a critical and commercial success, becoming the eighth highest grossing film of 1982, and since its release it has acquired a
cult following. She was set to reprise the role in the
following installments of the franchise, but she died before production began on the sequels;
Poltergeist II: The Other Side, filmed in 1985 and released in 1986, Her last on-screen appearance was in the
Hill Street Blues episode "Requiem for a Hairbag", which aired on November 18, 1982, only two weeks after her death. In the episode, she played a teenaged mother who was a victim of parental abuse and chose to give her baby up for adoption, out of fear of repeating the cycle of abuse that she endured with her own mother; due to an altercation with her abusive partner John Sweeney that occurred just before the episode was filmed, her bruises on screen were real. The episode was dedicated to her memory. Dunne was cast in the miniseries
V in 1982; she died during filming, so her role was portrayed by actress
Blair Tefkin. According to series creator
Kenneth Johnson, recovered footage of Dunne was used in a
cameo appearance. The series was released in 1983, and is dedicated to her memory. ==Personal life==