Christopher Lee was 82 in Star Wars: Episode III - Revenge of the Sith when he played the character 'Count Dooku'.
That was over 19 years ago in 2005.
In 2015 he died aged 93, starring in 288 films in his career, 54 of those after Star Wars: Episode III - Revenge of the Sith was first released. If he were alive today he would be 101.
In Star Wars: Episode III - Revenge of the Sith, I think Christopher Lee looks: