The provided text offers an extensive biographical overview of American actress Martha Plimpton, beginning with her early life as the daughter of actors Keith Carradine and Shelley Plimpton. It methodically traces her acting career through distinct time periods, highlighting her breakthrough role in The Goonies and her later transition to mature parts in film, television, and theater, which includes multiple Tony Award nominations and an Emmy Award win. Furthermore, the source briefly covers her personal life, mentioning her relationship with River Phoenix, and details her significant political campaigns, particularly her strong advocacy for abortion and LGBT rights. Finally, the text concludes with comprehensive lists of her acting credits across various media and a summary of her numerous awards and nominations.