DeForest Kelley was 70 in Star Trek VI: The Undiscovered Country when he played the character 'Dr. Leonard McCoy'.
That was over 32 years ago in 1991.
In 1999 he died aged 79, starring in 43 films in his career, 7 of those after Star Trek VI: The Undiscovered Country was first released. If he were alive today he would be 104.
In Star Trek VI: The Undiscovered Country, I think DeForest Kelley looks: