Filming yesterday was at Marshfield church and guess who the bride was?
Wonder who she's marrying this time... apparently it may be a black actor, but this is unconfirmed. Either way, its definitely not a flashback since its a different dress.
Image courtesy of FanaticalWhovian :)
The first scene filmed was of Donna running into the church, and the second seemed to be after the wedding where the guests were having photos taken of them.
As well as this, the TARDIS was hanging around and Tennant was also seen coming out of it. So I guess he's crashing the wedding.