megacon 12

I think, in going back to what I was saying earlier about how I’ll just work instinctively from the lines, I guess there’s always going to be an element of yourself in the roles you play because, ultimately, that’s what you’re sourcing. You’re sourcing a sort of instinctive response to something. But I’m not as badass as River Song! … I’m not actually like River Song at all!
— 

Alex Kingston, MegaCon Q&A, 12 April 2015 [x]

(And then she made a funny face at the audience, so goodness knows how she actually feels about that last bit.)