George Segal was 26 in The Young Doctors when he played the character 'Dr. Howard'.
That was over 63 years ago in 1961.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
In 2021 he died aged 87, starring in 94 films in his career, 92 of those after The Young Doctors was first released. If he were alive today he would be 90.
In The Young Doctors, I think George Segal looks: