Ian McDiarmid was 56 in Star Wars: Episode II - Attack of the Clones when he played the character 'Chancellor Palpatine'.
That was over 22 years ago in 2002.
Today he is 79, and has starred in 36 movies in total, 12 of those since Star Wars: Episode II - Attack of the Clones was released.
In Star Wars: Episode II - Attack of the Clones, I think Ian McDiarmid looks: