29. Sigourney Weaver (Born In 1949) – Alien, Avatar

Sigourney Weaver's Ellen Ripley in Alien changed what an action hero could look like, and she earned an Oscar nomination for the role in Aliens. She has also shown a gift for comedy in Ghostbusters and Working Girl.

Now in her 70s, she's part of two of the biggest franchises around. She has returned to Pandora in James Cameron's Avatar sequels and joined the Star Wars universe in The Mandalorian & Grogu.