Bonnie Bedelia was 20 in Then Came Bronson when she played the character 'Temple Brooks'.
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 75, and has starred in 59 movies in total, 58 of those since Then Came Bronson was released.
In Then Came Bronson, I think Bonnie Bedelia looks: