First official set picture of Doctor Who filming + confirmed guests

Rupert Graves, David Bradley and Mark Williams to join the TARDIS trio for series 7.

With the filming for series 7 underway, the BBC has released the first official set pic (Above) and the following info, confirming 3 guest stars;

Filming is underway on the new series of Doctor Who and the last for the Ponds!
Filming has just started on Series 7 of Doctor Who in Cardiff. This series will see the last days of the Ponds with Karen Gillan and Arthur Darvill returning for their final, rollercoaster voyage with the Doctor. Amy and Rory have been at the Doctor's side for more than two series but what will he do after their heartbreaking departure?
On returning for his third series as the Eleventh Doctor, Matt Smith says: "It's thrilling and exciting to be back and working with two of my closest friends."
Karen Gillan adds: "It's just brilliant to be back on the TARDIS with Matt and Arthur for our craziest adventures yet."
Plus new guest stars so far confirmed to star will include David Bradley, Rupert Graves and Mark Williams.

David Bradley is better known as Argus Filch from Harry Potter and was the voice of the Shanseeth in Death Of The Doctor in SJA.
Rupert Graves is simply Lestrade from Sherlock, Moffat's other show for the BBC.  Mark Williams' reported role is that he is rumored to be Rory's dad.