Rene Russo didn't have much to do as mother Frigga in the first Thor, but she's hoping she'll be called upon for more when sequel Thor: The Dark World begins shooting soon. "You know, they cut me [down] in the first film," Russo told us last night at the premiere of The Bourne Legacy. "[Director] Kenneth Branagh sent me a nice note, because he understood, he's an actor. You move on, what are you going to do? But I think they're going to need a good mom in the next film. Loki needs his mom. What the hell?" Indeed! How might Frigga feel about her adopted son's evil antics in The Avengers? "I have a lot of compassion for him. But we might have to have a conversation about what he just did," Russo laughed. "And I might have to have a chat with Thor. But I am so confused - is Thor my son or not? People have been telling me recently, 'No, you're not his mother.' It's all so confusing! I got to tell ya, it would be a little embarrassing if I don't know. I need to read more about her." Luckily, Vulture offered to hook her up with some Thor back issues. "That would be great!" Russo said, adding with a laugh, "As long as it's not too complicated. I prefer fewer words in my comics! I grew up on Archie!"