It's Matt Smith, who was in Ruby in the Smoke with Billie Piper. Absolutely NOT my idea of the Eleventh Doctor.
He looks a lot like Bryan Dick. Too much, really! I actually mistook Smith for Our Blythe about a year ago.
Comparison shots: Here is Matt Smith (in Shadow of the North, I think):
And Bryan Dick in The Old Curiosity Shop (still have not seen, but this is one of my favorite pics of him EVER!):
Scary how much they look alike. Bryan is cuter. :p
Smith seems too young. Seriously, he looks like a child! *holds on to David Tennant a bit longer* PLEASE DON'T GO, TEN!!!!!
We'll have to wait a while before we can judge Eleven, though...
Damn, now I'm seeing Our Blythe as The Doctor. Maybe they can resurrect Adam for an episode.