Richard Harris was 27 in Shake Hands with the Devil when he played the character 'Terence O'Brien'.
That was over 65 years ago in 1959.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
In 2002 he died aged 72, starring in 82 films in his career, 81 of those after Shake Hands with the Devil was first released. If he were alive today he would be 93.
In Shake Hands with the Devil, I think Richard Harris looks: