Charlton Heston was 43 in Planet of the Apes when he played the character 'George Taylor'.
That was over 56 years ago in 1968.
In 2008 he died aged 84, starring in 155 films in his career, 114 of those after Planet of the Apes was first released. If he were alive today he would be 100.
In Planet of the Apes, I think Charlton Heston looks: