Spoonbat found a longer interview with Kat Dennings, which has some more Thor tidbits. Below I’ve included the quote that pertains to Natalie and another that sums up Kat’s enthusiasm for the project. I suggest reading the whole article at Collider though.
COLLIDER: Okay. I believe I read, and correct me if I’m wrong, that your character is a friend of Natalie Portman’s character?
DENNINGS: Yeah. Yeah. I don’t know how much I can say.
DENNINGS: Listen to me, listen to me. It’s going to be worth every moment of waiting. I promise.