Sydney Pollack was 26 in War Hunt when he played the character 'Sgt. Owen Van Horn'.
That was over 62 years ago in 1962.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
In 2008 he died aged 73, starring in 55 films in his career, 54 of those after War Hunt was first released. If he were alive today he would be 89.
In War Hunt, I think Sydney Pollack looks: