I am glad for the couple, David Tennant is a very lucky guy. He is getting married to Georgia Moffett, who played in the episoide The Doctor's Daughter. You can read more at this link:

http://blastr.com/2011/01/10th-doctor-who-engaged-t.php

It's all well, and good, but kinda creepy to marry someone who played his daughter

She's hot

and btw, they've been dating during/since they filmed that episode.

Well that would be at least 2 co stars he's dated then, he was dating Sophia Myles (who is way cuter by the way) since she was on "Girl in the Fireplace". but he broke up with her once she left for the States to be on a short lived Vampire series

Dexter married his sister.

Err, I mean the respective actors did marry.

I suppose what happens on the set stays on the set.

Well I guess that makes the Pinewood set about as odd as the Hollywood set. Actors are such strange folk

They look good together as father and daughter. Disturbing.

and now they're separated.

that's what you get for keeping it in the fabricated family

Well, Kira and Bashir didn't work out in the end, either, and they weren't even fabricated family.

David Tennant and Georgia Moffett, eh? So the girl who played Sally Sparrow is still available? That's all I really need to know.