http://www.telegraph.co.uk/culture/culturenews/5100713/Romola-Garai-to-play-Emma-in-BBCs-latest-Jane-Austen-adaptation.html As the URL says, Romola Garai will be Emma in the upcoming BBC adaptation. I guess we'll see: I thought she did well enough in Daniel Deronda; went back and forth over her Celia in Branagh's AYLI (though I suspect that was due to the director); hated practically everything about I Capture the Castle (it's one of my favorite books), so can't recall her actual performance at all; and have yet to see the McKellen King Lear (I recorded it, but haven't had time to watch it yet--or inclination, honestly; Lear is such a *downer*. :P )
Jonny Lee Miller will be Mr. Knightley, which will probably be more confusing than anything, given that he was already Edmund Bertram in the misbegotten Rozema MP.