Marty Feldman was 39 in Young Frankenstein when he played the character 'Igor'.
That was over 49 years ago in 1974.
In 1982 he died aged just 48, starring in 19 films in his career, 12 of those after Young Frankenstein was first released. If he were alive today he would be 89.
In Young Frankenstein, I think Marty Feldman looks: