Jerry Orbach was 18 in Marty when he played the character 'Ballroom Extra (uncredited)'.
That was over 69 years ago in 1955.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
In 2004 he died aged 69, starring in 65 films in his career, 65 of those after Marty was first released. If he were alive today he would be 88.
In Marty, I think Jerry Orbach looks: