OK so technically the title for this post is slightly misleading as it's not actually the TV character of Doctor Who marrying his TV character cloned daughter from the episode "The Doctor's Daughter", but actually 10th Doctor actor David Tennant who is set to marry actress and daughter of 5th Doctor actor Peter Davidson - Georgia Moffett... Did you keep up with that? Good.
I wasn't aware that the two were even an item until today but word has it that they've been seeing each other since the fateful episode back in 2008 and are now set to wed on New Year's day 2012.
I've met Georgia face to face and I'll say this to Mr. Tennant: "You're a lucky man"! :)