Brian Dennehy was 38 in Looking for Mr. Goodbar when he played the character 'Surgeon'.
That was over 47 years ago in 1977.
In 2020 he died aged 81, starring in 133 films in his career, 131 of those after Looking for Mr. Goodbar was first released. If he were alive today he would be 85.
In Looking for Mr. Goodbar, I think Brian Dennehy looks: