Casey Kasem was 51 in Ghostbusters when he played the character 'Self (voice)'.
That was over 40 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 92.
In Ghostbusters, I think Casey Kasem looks: