Hal Holbrook was 40 in The Group when he played the character 'Gus Leroy'.
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).
In 2021 he died aged 95, starring in 111 films in his career, 110 of those after The Group was first released. If he were alive today he would be 99.
In The Group, I think Hal Holbrook looks: