Robin Williams was 48 in A.I. Artificial Intelligence when he played the character 'Dr. Know (voice)'.
That was over 23 years ago in 2001.
In 2014 he died aged 63, starring in 158 films in his career, 77 of those after A.I. Artificial Intelligence was first released. If he were alive today he would be 72.
In A.I. Artificial Intelligence, I think Robin Williams looks: