Sigourney Weaver was 26 in Annie Hall when she played the character 'Alvy's Date Outside Theatre'.
That was over 46 years ago in 1977.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 74, and has starred in 114 movies in total, 113 of those since Annie Hall was released.
In Annie Hall, I think Sigourney Weaver looks: