Gene Wilder was 40 in Young Frankenstein when he played the character 'Dr. Frederick Frankenstein'.
That was over 49 years ago in 1974.
In 2016 he died aged 83, starring in 44 films in his career, 28 of those after Young Frankenstein was first released. If he were alive today he would be 90.
In Young Frankenstein, I think Gene Wilder looks: