Kurt Russell was 11 in It Happened at the World's Fair when he played the character 'Child who kicks Mike at the fair'.
That was over 61 years ago in 1963.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 72, and has starred in 85 movies in total, 84 of those since It Happened at the World's Fair was released.
In It Happened at the World's Fair, I think Kurt Russell looks: