Clark Gable was 21 in Forbidden Paradise when he played the character 'Soldier in Czarina's guard (uncredited)'.
That was over 100 years ago in 1924.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
In 1960 he died aged just 59, starring in 135 films in his career, 134 of those after Forbidden Paradise was first released. If he were alive today he would be 123.
In Forbidden Paradise, I think Clark Gable looks: