Gareth Cattermole/Getty Images for IMDb [This story contains spoilers for Avatar: Fire and Ash] Sigourney Weaver may have built her career as Alien's Ripley, one of the great heroines of American blockbusters, but the three-time Oscar nominee has spent decades avoiding any semblance of typecasting. Of late, Weaver has pulled off vivid performances in larger-than-life supporting parts, often with a villainous bent - as in Paul Schrader's Master Gardener, or Bryan Fuller's Dust Bunny, a well-reviewed new indie thriller that hit theaters earlier this month.