Don't need to look at the photo (not a great one, to be frank) to recall her being a decent looker at the Sarah Jane season 2 launch... but also very pregnant, ISTR. Think she's working on Casualty now, so Who might be a good next step... or something she'd be asked to do having proved herself as a sure pair of hands. (NB: if checking her back credits, bear in mind that she was Nikki Smith till she got married).
Oh, and to answer Timof Nine: in the line-up of three producers/executive producers, if Moffat is the one who's supposed to be mostly ideas man and main writer, Wilson was the one who's supposed to do very little writing, but a lot of working out how to actually shoot the b!!!ding thing on that budget.