Laurie Metcalf was 22 in A Wedding when she played an uncredited character.
That was over 46 years ago in 1978.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 68, and has starred in 47 movies in total, 46 of those since A Wedding was released.
In A Wedding, I think Laurie Metcalf looks: