Matt Smith (No, not that one) proposed to his lady-friend at the Doctor Who Experience (which is a whole lot of fun and I highly recommend for any Whovians in London).
When Matt Smith (Yes, that one) heard about it, he sent the happy couple a letter.
“Matt Smith proposing to his girlfriend! Firstly, being a Smith means phone calls to the bank take so much longer – there are so many Smiths!! But I bet none of them have proposed at the Doctor Who Experience!”
Go to Set Phasers to LOL for the rest of his lovely note!