Robert Stack was 70 in Joe Versus the Volcano when he played the character 'Dr. Ellison'.
That was over 34 years ago in 1990.
In 2003 he died aged 84, starring in 69 films in his career, 11 of those after Joe Versus the Volcano was first released. If he were alive today he would be 105.
In Joe Versus the Volcano, I think Robert Stack looks: