Robert Shaw was 22 in The Lavender Hill Mob when he played the character 'Chemist at Police Exhibition (uncredited)'.
That was over 73 years ago in 1951.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
In 1978 he died aged just 51, starring in 43 films in his career, 42 of those after The Lavender Hill Mob was first released. If he were alive today he would be 96.
In The Lavender Hill Mob, I think Robert Shaw looks: