Swoosie Kurtz was 31 in Slap Shot when she played the character 'Shirley Upton'.
That was over 47 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 79, and has starred in 52 movies in total, 51 of those since Slap Shot was released.
In Slap Shot, I think Swoosie Kurtz looks: