Martha Plimpton is an American actress, activist, and former model. Her feature-film debut was in Rollover (1981); she subsequently rose to prominence in the Richard Donner film The Goonies (1985). She has also appeared in The Mosquito Coast (1986), Shy People (1987), Running on Empty (1988), Parenthood (1989), Samantha (1992), Small Town Murder Songs (2011), Frozen II (2019), and Mass (2021).

The Goonies is a 1985 American adventure comedy film directed and co-produced by Richard Donner from a screenplay by Chris Columbus based on a story by Steven Spielberg and starring Sean Astin, Josh Brolin, Jeff Cohen, Corey Feldman, Kerri Green, Martha Plimpton, and Ke Huy Quan, with supporting roles done by John Matuszak, Anne Ramsey, Robert Davi, Joe Pantoliano and Mary Ellen Trainor. In the film, a group of kids who live in the "Goon Docks" neighborhood of Astoria, Oregon, attempt to save their homes from foreclosure and, in doing so, they discover an old treasure map that takes them on an adventure to unearth the long-lost fortune of One-Eyed Willy, a legendary 17th-century pirate. During the adventure, they are pursued by a family of criminals who want the treasure for themselves.