Well, I think this was sadly expected, wasn't it?
While it’s been heavily speculated for a while that 11th Doctor actor Matt Smith would leave the series during the anniversary period, it’s now been confirmed that he will in fact be regenerating during the Christmas 2013 special.
The episode, due to be filmed in September will be the final episode to feature Smith’s Doctor and while both series writer Steven Moffat and Jenna-Louise Coleman have been confirmed for the eighth series (rumoured to be consisting of 12 episodes to air in Autumn 2014, according to a leaked source), a new Doctor will be joining them for the next series.
So far rumours seem to be indicating that former Cutting It actor, Ben Daniels is in line to take on the role of the 12th Doctor. The actor has previously worked with former companion actress Freema Agyeman on Law And Order: UK and if cast, will be 50 when his first series will air next year as well as the show's first opnely gay actor to take on the role of the Time Lord.
However, these are just rumours in relation to Daniels casting but Matt’s exit has definitely been confirmed and while it’s been an interesting three series with his vibrant Doctor, I’m pretty sure the next guy in the TARDIS will be equally as wonderful to watch.
Matt Smith’s Departure: http://www.telegraph.co.uk/culture/tvandradio/doctor-who/10093520/Matt-Smith-to-quit-Doctor-Who-after-Christmas-special.html
N.B: Good chance this blog will edited later on in the night if more news surfaces.