Tom Kenny was 22 in Bob Goldthwait -- Don't Watch This Show when he played an uncredited character.
That was over 38 years ago in 1986.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 61, and has starred in 191 movies in total, 186 of those since Bob Goldthwait -- Don't Watch This Show was released.
In Bob Goldthwait -- Don't Watch This Show, I think Tom Kenny looks: