10 actors have explored the final frontier in Star Trek and faced deadly Xenomorphs in the Alien franchise. Ridley Scott's Alien premiered in 1979 and remains one of the most influential science fiction horror films of all time. Following Ellen Ripley (Sigourney Weaver) and the doomed crew of the Nostromo, Alien spawned numerous sequels, prequels, and crossovers, including projects that are still in the works as of 2024. From the facehugger to the chestburster to the adult Xenomorph, the team behind Alien also created some of the most iconic visuals in cinema.

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