How did Anne Hathaway prepare before becoming Catwoman "The Dark Knight Rises" (2012)

"The characterization of her is informed by the world around her. So what I sought to do with my Selina was make her part of Christopher Nolan's Gotham, just as I thought Michelle Pfeiffer's was very brilliantly a part of Tim Burton's...

"Everything about Selina has to be smooth. Except for her eyes. So everything was informed by that. I wanted to find a way of talking where it wasn't as on the nose as a purr, but where you have to lean in a bit to hear her. So in a way you're concentrating so hard on what she's saying that you find yourself trapped in the moment you're talking to her.

[How did Anne Hathaway get in Catwoman shape?] "I did as much as I could do without exhausting my body so much that I couldn't sleep at night, which is a problem if you're exercising too much. Sometimes you won't sleep. But I kept it up to that point." More

Source: Empireonline.com