`` It 's a sublime bit of casting .
It
`` sublime bit casting
`` <m> It </m> 's a sublime bit of casting .
Smith , 26 , who played a young political researcher in the show , will become the biggest star of all after winning the role of the 11th Doctor .
Speaking to The Guardian , Buchan said his old co-star would make an excellent Doctor Who .
`` <m> It </m> 's a sublime bit of casting .
He 's got that huge hair , a twinkle in his eye - Matt 's the king of geek chic .
He is possibly going to be one of the best Doctors we 've ever had . ''