Smith left Doctor Who so he could focus on his attempts to make it big in Hollywood. Except he forgot he's a shitty actor and his footface isn't pretty enough to get by. Lost River bombed and its looking like Terminator Genisyth is going to bomb. Update: It did. Matt was probably the best thing in it, pity he was only in it for ten seconds.
After three weeks of 'auditions' (aka. hardcore bondage) Moffat announced that it had "always been Matt" and proposed. They were married in a quiet ceremony together with Moffat's life partner Mark Gatiss.
"The Doctor is a very special part, and it takes a very special actor to play him. You need to be old and young at the same time, a boffin and an action hero, a cheeky schoolboy and the wise old man of the universe. As soon as Matt walked through the door and blew me, we knew we had our man." - Executive producer Steven Moffat on Smith's casting.
LOOK AT MY MUSCLES