Anthony Michael Hall recently took a quick break from filming The Dead Zone to film his part in The Dark Knight but can't offer any details about the role.
"I signed a confidentiality agreement, and I can't say which part I'm playing because it affects the story," Hall told the newspaper. "I can't give away the suspense—it's a $200 million surprise, and I don't want to be the guy to ruin it."
Hall added: "I'm excited about it. Christian Bale [is] back as Batman. Heath Ledger is joining the cast as the Joker. Of course, Morgan Freeman and Michael Caine return, and they're great."
"My crew agreed to take a three-day weekend so I could fly Friday to go to London," Hall said. "It was just a thrill. I felt like a rock star leaving the set, flying to London, going to shoot on a Saturday, you know? ... My crew really gave me a gift, because they had to all vote union-wise to agree to not take a day's pay to help me out. I felt very honored that they did that for me."