Martha Campbell Plimpton (born November 16, 1970) is an American actress and singer and former model. Plimpton is a screen, stage and television actress. She first appeared as Jonsy in the feature film River Rats

River Rats

-Plot summary:Frank and Joe Hardy head to the Big Bison River in Montana to experience its beauty and wonder, through the form of water sports. They are greeted by Owen Watson, a friend, and head off into the river, but witness a hitman killing Owen in broad daylight. The brothers then promise...

(1984) before rising to prominence in the Richard Donner

Richard Donner

Richard Donner is an American film director, film producer, and comic book writer.The production company The Donners' Company is owned by Donner and his wife, producer Lauren Shuler Donner. After directing the horror film The Omen, Donner became famous for the hailed creation of the first modern...

 film The Goonies

The Goonies

The Goonies is a 1985 American adventure-comedy film directed by Richard Donner. The screenplay was written by Chris Columbus from a story by executive producer Steven Spielberg. The premise surrounds a band of pre-teens who live in the "Goon Docks" neighborhood of Astoria, Oregon hoping to save...

(1985) portraying the character Stef. She then appeared in The Mosquito Coast

The Mosquito Coast

The Mosquito Coast is a 1986 American film directed by Peter Weir, based on the novel by Paul Theroux. The film stars Harrison Ford, Helen Mirren, and River Phoenix. The film tells the story of a family that leaves the United States and tries to find a happier and simpler life in the jungles of...

(1986) portraying Emily Spellgood. Plimpton's role garnered her further success within the feature film industry.