Here is an interview with Chloe Moretz, who did such a great job playing Hit-Girl in Kick-Ass. It is an interesting interview, but I have just posted the parts about Nic here, you can read the whole thing at the link. I guess I don't have the director's cut version because my copy doesn't have any deleted scenes, which bums me out. I would love to see the one she is talking about here.

http://www.bryanreesman.com/blog/2010/04/16/hit-girl-the-real-kick-ass/

What was it like to work with Nicolas Cage?
Nicolas Cage is amazing. Just shaking his hand I was starstruck. I have never been able to work with an Oscar winner before.

Was he very protective of you?
Yeah. He’s an amazing actor, and he brought something to the character that I was able to feed off of as an actor.

Were there deleted scenes that didn’t make it but will be on the DVD?
There’s this one scene where Nick gives me my Hit-Girl belt because he built it. He gives it to me, and I think it’s so cool. As Mindy I’m always wearing it because I love it so much because he made it for me. There’s one scene that will be in the director’s cut. We start talking about what we’re going to do, and he goes, “And we’re not going to fail.” And he goes, “Harmonize it now!” Then he starts belting it: “We’re not going to fail!” That was one of the takes.

Did you know he was going to do that?
No! I wasn’t told. I almost cracked up, but I stayed in character.