Sigourney Weaver (Susan Alexandra Weaver)

Weaver is primarily known for her role of Ellen Ripley in the four Alien
films: Alien (1979), Aliens (1986), Alien 3 (1992), and Alien Resurrection 
(1997). Other notable roles include Dana Barrett in Ghostbusters (1984)
and its sequel Ghostbusters II (1989),Gorillas in the Mist: The Story of
Dian Fossey (1988), Working Girl (1988), and Grace Augustine in Avatar 
(2009). She played her first minor role in Woody Allen‘s 1977 comedy,
Annie Hall.

Her 1986 Academy Award nomination for Aliens is considered by many to
be a landmark in the recognition of science fiction, action, and horror
genres.