Sigourney Weaver

Sigourney Weaver (born October 8, 1949) is an American actress. She is best known for her work in the Alien films. Recently she gained critical acclaim for her work in the film, Avatar (2009), in which she had a lead role. She also had parts in WALL-E (2008), Baby Mama, and You Again. She is known as the "sci fi queen".