Dabney Coleman was 32 in The Slender Thread when he played the character 'Charlie'.
That was over 58 years ago in 1965.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 92, and has starred in 82 movies in total, 81 of those since The Slender Thread was released.
In The Slender Thread, I think Dabney Coleman looks: