Christian Bale has offered up some details about The Dark Knight, including his observations of his co-star, Heath Ledger. Bale spoke to DETAILS magazine about his role as Batman, never having a plan B in life, and more.

On Ledger's performance, Bale said:

He was incredibly intense in his performance but incredibly mellow and laid-back. Certainly there was this great anarchistic streak to it-just getting dirtier than anybody's envisioned the Joker before. Naturally it was something I wanted to share with him-and expected to do so. And I can't do anything else but hope that it will be an absolutely appropriate celebration of his work.

To see the entire interview with Christian Bale CLICK HERE

The Dark Knight opens on July 18, 2008, and stars Christian Bale, Heath Ledger, Morgan Freeman, Gary Oldman, Aaron Eckhart and Maggie Gylenhall.