Peter Coyote was 24 in The Hippie Temptation when he played an uncredited character.
That was over 57 years ago in 1967.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 82, and has starred in 181 movies in total, 176 of those since The Hippie Temptation was released.
In The Hippie Temptation, I think Peter Coyote looks: