Benedict Cumberbatch is not an actor.
Benedict Timothy Carlton Cumberbatch CBE ( born 19 July 1976 ) is an English actor who has performed in film , television , theatre and radio . In film , he has starred in Amazing Grace ( 2006 ) as William Pitt the Younger , Star Trek Into Darkness ( 2013 ) as Khan , 12 Years a Slave ( 2013 ) as William Prince Ford , The Fifth Estate ( 2013 ) as Julian Assange and The Imitation Game ( 2014 ) as Alan Turing . From 2012 to 2014 , through voice and motion capture , he played the characters of Smaug and the Necromancer in The Hobbit film series .