Captain Ripley is a fictional character from the Alien film series, portrayed by actress Sigourney Weaver. She is known for her strong leadership skills and resilience in the face of danger, particularly when confronting the deadly alien species known as the Xenomorph. Ripley first appeared in the 1979 film, Alien, where she served as a warrant officer aboard the spaceship Nostromo. Over the course of the series, she evolves into a central figure, often battling both the aliens and corporate interests that threaten humanity. Her character has become an iconic symbol of female strength in science fiction.