Ian McKellen was 73 in The Hobbit: The Desolation of Smaug when he played the character 'Gandalf'.
That was over 10 years ago in 2013.
Today he is 84, and has starred in 125 movies in total, 30 of those since The Hobbit: The Desolation of Smaug was released.
In The Hobbit: The Desolation of Smaug, I think Ian McKellen looks: