Ray Winstone was 18 in Sunshine in Brixton when he played an uncredited character.
That was over 48 years ago in 1976.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 67, and has starred in 98 movies in total, 95 of those since Sunshine in Brixton was released.
In Sunshine in Brixton, I think Ray Winstone looks: