THE 12TH DOCTORRRRRR.
Its Capaldi loool.
And yes this is very exciting indeed!
Gonna miss Matt Smith's quirkiness though
I don't know too much about the actor though. He does look like he'll fit the role very well; I'm just so excited for the change. Hopefully this Doctor will have less of a hyperactive puppy thing going on. Not that I didn't like Matt Smith's Doctor.
He's well known over here for The Thick Of It. You should check him out as Malcom Tucker (though nsfw since lots of swearing haha)
I'm not a Dr Who fan but I might be inclined to start watching it with him as the doctor.
Here's a selection of his best bits: