Holland Taylor was 25 in J.T. when she played the character 'Mrs. Arnold'.
That was over 54 years ago in 1969.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 81, and has starred in 67 movies in total, 66 of those since J.T. was released.
In J.T., I think Holland Taylor looks: