Sigourney Weaver was born on October 8, 1949, the daughter of Elizabeth Inglis (née Desiree Mary Lucy Hawkins; 1913–2007), an English actress, and the NBC television executive and television pioneer Sylvester "Pat" Weaver (1908–2002). Her uncle, Doodles Weaver, was a comedian and actor.

She began using the name "Sigourney Weaver" in 1963 after a minor character (Sigourney Howard) in F. Scott Fitzgerald's novel The Great Gatsby.

Sigourney Weaver's Family Tree