For those of you who haven’t already heard the 11th Doctor will be played by Matt Smith. Who? sez you.
Exactly.
Seriously though looking at imdb.com he was Jim in the TV versions of Philip Pullmans ‘Sally Lockheart Mysteries’. I only saw the Ruby in the Smoke, but I do remember thinking at the time that he was noticeable, despite the rather small role. He’s the youngers ever Doctor (26) which makes me feel dead old as I was already a fan of Tom Bakers’ Doctor and was only starting to watch Peter Davidson when Smith was born - 1982 for those who want to join me in my nostalgia.

So Ten is gone (and we’ll weep appropriately when the times comes) and Eleven has yet to appear. I’ll hold my breath - but not for too long.

BBC article and interview