VIDEO : Benedict Cumberbatch: I?m one of the ?stupidest actors? around

The 42-year-old screen star is preparing for his upcoming role as real life British spy Greville Wynne in Cold War movie 'Ironbark' and he has previously played WikiLeaks founder Julian Assange in 2004 movie 'The Fifth Estate' and the star has revealed he likes to play the role of "smart characters because he is drawn to them" because they are so different to who he is.