Sigourney Weaver is an American actress. She is known especially for her role of Ellen Ripley in the four Alien films: Alien, Aliens, Alien 3, and Alien Resurrection. Other notable roles include Dana Barrett in Ghostbusters and its sequel Ghostbusters II, Gorillas in the Mist: The Story of Dian Fossey, Working Girl, The Ice Storm, Galaxy Quest, Prayers for Bobby and Grace Augustine in Avatar.
Weaver has been nominated for three Academy Awards, three BAFTA Awards, two Emmy Awards, six Saturn Awards and seven Golden Globe Awards, winning two in 1988 for Gorillas in the Mist and Working Girl, becoming the first person ever to have won two acting Golden Globe Awards in the same year. She was also nominated for a Drama Desk Award and a Tony Award.
Her 1986 Academy Award nomination for Aliens is considered as a landmark in the recognition of science fiction, action, and horror genres, as well as a major step in challenging the gender role in cinema. Weaver progressively received fame for her numerous contributions to the science fiction film history and gained the nickname of "The Sci-Fi Queen". She played the lead role on USA Network's Political Animals miniseries as Elaine Barrish, a divorced former First Lady and Governor of Illinois, as well as the current Secretary of State.