Bill Condon talks about Rob, Kristen and Taylor.

From HitFix

Was there any actor who surprised you?
I think people will be surprised by everybody. In general, Kristen has such a huge journey to take and to watch her become this fierce, protective, powerful mother figure? I think that will surprise people. Taylor surprised me with his commitment and the dark places he goes to in this movie. And Rob, I think there is some sense that he has relaxed into this part and finally willing to show more of himself. His own charm, wit and grace are in evidence in this movie. It surprised me in how relaxed he seemed in something he's fought a little against before.

From moviefone

You mention the performers experimenting in the dailies. I think it would be fair to call you an actor's director -- the films you've directed have gotten stars Oscar nominations five times, and Jennifer Hudson won -- but Kristen Stewart, Robert Pattinson and Taylor Lautner grew up on these movies; they're maybe set in their ways and what they think the characters are. How do you come in and direct them for this last run?
I did not find any of them set in their ways. It felt like they were eager to explore. Part of the advantage I had was that after a lot of anticipation in three movies, now a huge number of things happen. These characters change so dramatically. When you think of where Bella stars, which is where she's been for all three movies, and by the end she's this fierce warrior-hunter-maternal-goddess. All the steps that get her there -- it's a huge amount of change. The same for Jacob and Edward. They grow up more than anything.

Catherine Hardwicke [who directed 'Twilight'] has a genius for getting inside the brain and is so in touch with what it's like to be a teenage girl. I couldn't imagine doing that first 'Twilight.' But I can imagine doing this one because it's more adult concerns happening in this story.