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Sigourney Weaver explains how Avatar, Alien, & Star Wars "couldn't be more different"

Sigourney Weaver, a veteran of two major franchises, namely Alien and Avatar, has now added a third one to the list in the ...

THEN AND NOW: The cast of 'Alien' 41 years later

Ridley Scott's sci-fi classic premiered in 1979, and starred Sigourney Weaver, Tom Skerritt, and Harry Dean Stanton.