**Sigourney Weaver**, American actress, is renowned for strong and complex female characters.

Her career is inextricably linked to the iconic role of Ellen Ripley in the *Alien* saga. The first film (1979) established her as a science fiction cinema heroine, and *Aliens* (1986) earned her an Academy Award nomination.

Weaver demonstrated great versatility in successful comedies such as *Ghostbusters* (1984) and *Working Girl* (1988), for which she won a Golden Globe. Other notable performances include Dian Fossey in *Gorillas in the Mist* (1988), which earned her another Golden Globe. She later reunited with director James Cameron in *Avatar* (2009).

Her style is characterized by intelligent, determined, and often pioneering characters, coupled with a remarkable screen presence.