Benedict Cumberbatch was 36 in The Hobbit: The Desolation of Smaug when he played the character 'Smaug / Necromancer'.
That was over 10 years ago in 2013.
Today he is 47, and has starred in 93 movies in total, 46 of those since The Hobbit: The Desolation of Smaug was released.
In The Hobbit: The Desolation of Smaug, I think Benedict Cumberbatch looks: