Allison Janney was 28 in Who Shot Patakango? when she played the character 'Miss Penny'.
That was over 35 years ago in 1989.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 64, and has starred in 96 movies in total, 94 of those since Who Shot Patakango? was released.
In Who Shot Patakango?, I think Allison Janney looks: