Hardy was Nolan's first choice for the role, although it at first seemed he wouldn't be available as, at the time, he was about to start on George Miller's Mad Max reboot (now Hardy's next project after The Dark Knight Rises). As soon as Nolan heard about the film's delay, the director gave him a call. According to Hardy (who does an uncanny Nolan impression, by the way), the conversation went something like this:
Nolan: Tom, I was just considering doing a new Dark Knight and I was just wondering....There's a character in it, which I think you would be perfect for. You might not be interested, because I appreciate...Um, I'm asking quite a bit of you as an actor to....wear a mask. For six months. It's something I'd like to talk to you about if you're interested and maybe you might consider, um, having a think about it. He's a villain. I think we're going to go big on this last one.
Hardy: Are you saying I'd have the access to all the stunt coordination team that I want to play with, martial-arts wise, all the weapons I could possibly want to play with, and I get to hang out with you for 6 months? And all I have to do is wear a mask?
Nolan: Yeah, basically.
Hardy: Fucking sign me up, man.