TMDb/Doc Martin Celebrity Explore Sigourney Weaver's iconic sci-fi legacy and her most surprising cameos, from Alien to an unforgettable TV guest spot. March 17, 2026 AceShowbiz - Sigourney Weaver is widely recognized as a Hollywood icon and the undisputed Queen of Sci-fi, famous for her groundbreaking role as Ripley in Alien. Over her illustrious career, Sigourney Weaver has starred in numerous notable films including Ghostbusters, Gorillas in the Mist, Working Girl, Galaxy Quest, and all three installments of the Avatar franchise.