Casey Kasem was 51 in Ghostbusters when he played the character 'Self (voice)'.
That was over 39 years ago in 1984.
In 2014 he died aged 82, starring in 83 films in his career, 61 of those after Ghostbusters was first released. If he were alive today he would be 90.
In Ghostbusters, I think Casey Kasem looks: