David Cronenberg was 22 in Palace of Pleasure 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 81, and has starred in 62 movies in total, 59 of those since Palace of Pleasure was released.
In Palace of Pleasure, I think David Cronenberg looks: