Alan Cumming was 23 in Conquest of the South Pole when he played an uncredited character.
That was over 34 years ago in 1989.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 58, and has starred in 101 movies in total, 99 of those since Conquest of the South Pole was released.
In Conquest of the South Pole, I think Alan Cumming looks: