Robin Williams was 36 in The Adventures of Baron Munchausen when he played the character 'King of the Moon'.
That was over 35 years ago in 1988.
In 2014 he died aged 63, starring in 158 films in his career, 129 of those after The Adventures of Baron Munchausen was first released. If he were alive today he would be 72.
In The Adventures of Baron Munchausen, I think Robin Williams looks: