That was over 44 years ago in 1977.
Today she is 71, and has starred in 94 movies in total, 91 since Annie Hall was released.
In Annie Hall, I think Sigourney Weaver looks:
Annie Hall scores 7.8 out of 10 on The Movie Database.
Sigourney Weaver's first acting role was as 'Alvy's Date Outside Theatre' in Annie Hall, released in 1977 when she was 27.