Martin Sheen was 25 in Ten Blocks on the Camino Real when he played the character 'Kilroy'.
That was over 58 years ago in 1966.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 83, and has starred in 239 movies in total, 238 of those since Ten Blocks on the Camino Real was released.
In Ten Blocks on the Camino Real, I think Martin Sheen looks: