Louise Fletcher was 27 in A Gathering of Eagles when she played the character 'Mrs. Kemler'.
That was over 61 years ago in 1963.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 89, and has starred in 84 movies in total, 83 of those since A Gathering of Eagles was released.
In A Gathering of Eagles, I think Louise Fletcher looks: