Sam Worthington was 23 in Bootmen when he played the character 'Mitchell'.
That was over 24 years ago in 2000.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 47, and has starred in 52 movies in total, 41 of those since Bootmen was released.
In Bootmen, I think Sam Worthington looks: