Christopher Walken was 11 in The Boy Who Saw Through when he played the character 'Ernest'.
That was over 68 years ago in 1956.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 80, and has starred in 144 movies in total, 140 of those since The Boy Who Saw Through was released.
In The Boy Who Saw Through, I think Christopher Walken looks: