Gary Busey was 22 in The Love-Ins when he played the character 'Hippie with Loudspeaker (uncredited)'.
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 79, and has starred in 133 movies in total, 132 of those since The Love-Ins was released.
In The Love-Ins, I think Gary Busey looks: