'Alien: Covenant', Sir Ridley Scott's next chapter in the Alien prequel series and sequel to 'Prometheus' comes out in three weeks. On The Late Show, Stephen Colbert had a surprise guest in a skit with him.

Sigourney Weaver, one of the first female action stars and the most important as Ellen Ripley, joined Colbert on the show, to act out a parody of the new Alien film. Weaver can still kick butt as Ripley, even in a comedy skit.

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