Christopher Plummer was 55 in An American Tail when he played the character 'Henri (voice)'.
That was over 37 years ago in 1986.
In 2021 he died aged 91, starring in 176 films in his career, 116 of those after An American Tail was first released. If he were alive today he would be 94.
In An American Tail, I think Christopher Plummer looks: