Chris and Jonathan Nolan talk The Dark Knight!

Now that Christopher Nolan's latest pic - duelling magicians drama The Prestige - is ready to enter cinemas, he and his scriptwriting brother can devote themselves full time to working on The Dark Knight, the sequel to Batman Begins, which Chris co-wrote and directed and which Jonathan was a consultant for.

Out and about on the press tour for The Prestige, the pair has been talking about the new film - well, as much as they can, anyway. With the script still in progress, they're naturally being cagey as to what they'll reveal. Comingsoon.net collared them and asked about the development of the movie so far, including the script work so far: "We keep it very close to the chest. We've been working on the script for a long time, over a year now one way or another with David Goyer and my brother, but it has to be right. We are almost finished. You want to know what page I'm on?" laughs Nolan. "I wouldn't tell the studio that, I'm not going to tell you that! What I will say is it's coming along. We've finished constructing the Joker's character and so we we've been able to think about that." He admits that casting Heath Ledger as the grinning villain was down to more luck than anything else. "You know, his casting was a series of fortunate events, he expressed an interest. I hadn't really thought that he would be interested in doing it but it was worth a try so it was actually a very early conversation. Then, you know, we realised we were seeing the same character."

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