From the BBC: Smith, who is the 11th actor to play the Time Lord on TV, will take over from David Tennant in the lead role of the long-running show next year.
Dr Who is one of the BBC's most popular shows and Moffat is under a lot of pressure to continue its success.
"What if I broke Doctor Who? That would be a tragedy," he said at the 2009 Screenwriters' Festival in Cheltenham.
"Yes, you do feel [the] pressure," he added.
Filming began in July on the new series of the time travel saga.
-- Posted from my iPhone