Lee Majors was 23 in Strait-Jacket when he played the character 'Frank Harbin'.
That was over 60 years ago in 1964.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 85, and has starred in 65 movies in total, 64 of those since Strait-Jacket was released.
In Strait-Jacket, I think Lee Majors looks: