The actress, who plays Catwoman in the superhero film, admitted that she struggled to keep her cool while reviewing the top-secret document as she felt incredibly lucky to be able to do so before anyone else.
"I was in a room by myself reading a script. I think there was a guard outside. A part of me was trying to stay professional, like, 'This is going to be your one chance to read it for many, many months, so really take it in'," Hathaway recalled in an interview with MTV News.
"And a part of me was like, 'Holy s**t! This is so cool! Oh my god! I am the envy of so many million people right now'. I just could not believe my luck, so I had those two things going. Keeping it cool and, pardon the pun, bats**t crazy."
Hathaway also discussed her methods of preparation for taking on the iconic role of Catwoman, explaining: "I picked up The Dark Knight archives, and I picked up a book that explored the history of Catwoman, which was actually really, really helpful 'cos you just realise she can take anything.
"She's so the embodiment of her time and whatever world she's in. I've seen versions where she's incredibly glamorous, and I've seen versions where she's a street kid, and that kind of informed my idea in that part of the way she cons people is she seamlessly and effortlessly becomes whatever their idea of who she is, is."
Nolan recently praised Hathaway for her performance in The Dark Knight Rises, saying that she deserves a Catwoman solo film for her "incredible" work.
Watch the trailer for The Dark Knight Rises below: