Jenna-Louise Coleman, 25 year old actress from Emmerdale and Waterloo Road was announced this morning as the newest companion to travel with the Doctor in the TARDIS after the Ponds take their in episode 5 of the coming series. Episode 5 Moffat has said will feature “a final encounter with the Weeping Angels in ep 5. Not everyone gets out alive & I mean it this time.”
Jenna’s first official episode will be the 2012 Christmas special which will be followed by 8 more episodes of series 7 in 2013. All of this of course leading directly into the 50th anniversary of the show in November 2013.
The only other information we currently have on the new companion is this quote from Steven Moffat, “It’s not often the Doctor meets someone who can talk even faster than he does, but it’s about to happen. Jenna is going to lead him his merriest dance yet. And that’s all you’re getting for now. Who she’s playing, how the Doctor meets her, and even where he finds her, are all part of one of the biggest mysteries the Time Lord ever encounters. Even by the Doctor’s standards, this isn’t your usual boy meets girl.”
You can read BBC America’s press release here