Actor: Sigourney Weaver
Sigourney Weaver played Ellen Ripley across four Alien films, in a part originally written for a man and left unchanged when she was cast, which is why the character behaves without any of the concessions the period expected.
Aliens brought a Best Actress nomination, which was almost unheard of for a science fiction action film, and she was nominated twice more in the same year for Gorillas in the Mist and Working Girl.
Ghostbusters, Galaxy Quest and Avatar show a comic and commercial range, and she has worked continuously for five decades.
