John Mahoney was 59 in Atlantis: The Lost Empire when he played the character 'Preston B. Whitmore (voice)'.
That was over 23 years ago in 2001.
In 2018 he died aged 77, starring in 50 films in his career, 7 of those after Atlantis: The Lost Empire was first released. If he were alive today he would be 83.
In Atlantis: The Lost Empire, I think John Mahoney looks: