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The "Alien" movie franchise – “Alien” (1979), “Aliens” (1986), "Alien 3" (1992) and "Alien Resurrection" (1997) – enjoyed massive popularity and led to numerous comic books, video games and spin-offs. The stars of the classic sci-fi films became global names and many went on to enjoy successful acting careers in the following years.

As Sigourney Weaver celebrates her birthday on Oct. 8, we look back at her top film franchise “Alien” and what her co-stars are up to now.

(Pictured, L-R) "Alien," "Aliens," "Alien 3" and "Alien: Resurrection"

