Roddy McDowall was 55 in Fright Night when he played the character 'Peter Vincent'.
That was over 39 years ago in 1985.
In 1998 he died aged 70, starring in 166 films in his career, 55 of those after Fright Night was first released. If he were alive today he would be 95.
In Fright Night, I think Roddy McDowall looks: