"Very, very interestingly, Steven has told Alex Kingston, who plays River,
“Very, very interestingly, Steven has told Alex Kingston, who plays River, everything. Everything, about the whole story, about the whole arc, about where it’s all going, because her character is meant to know because she’s from the Doctor’s future. But told me nothing. So Alex knows. Which is infuriating.” -Matt Smith. So she IS River…
