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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 (1984) before rising to prominence in the Richard Donner film The Goonies (1985) portraying the character Stef. She then appeared in The Mosquito Coast (1986) portraying Emily Spellgood. Plimpton's role garnered her further success within the feature film industry. Throughout her career Plimpton has appeared in many feature films including critically successful films Running on... MORE

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 (1984) before rising to prominence in the Richard Donner film The Goonies (1985) portraying the character Stef. She then appeared in The Mosquito Coast (1986) portraying Emily Spellgood. Plimpton's role garnered her further success within the feature film industry. Throughout her career Plimpton has appeared in many feature films including critically successful films Running on Empty (1988), Parenthood (1989), Eye of God (1997), The Sleepy Time Gal (2001), Hair High (2004) and Small Town Murder Songs (2011). Plimpton has also developed and established a very successful career in stage productions. She has appeared on Broadway and in theatre throughout her career. She is recognised on Broadway for her roles in The Coast of Utopia (2006–2007), Top Girls (2007–2008), Pal Joey (2008–2009) and Shining City (2006–2007). She has performed in theatre productions of The Playboy of the Western World, A Midsummer Night's Dream, The Glass Menagerie, Hedda Gabler, The Sisters LESS