Kat Dennings is officialy set to reprise her role as Darcy Lewis in Thor: The Dark World. According to Deadline her role has even been expanded. So she'll have more screen time, and be a little bit more than Natalie Portman's comic relief.
Thor 2 will be directed by Alan Taylor (Game of Thrones) and will be released November 8th, 2013. Chris Hemsworth, Tom Hiddleston, Anthony Hopkins, Natalie Portman, and Idris Elba are all back to reprise their roles. Then there's new comers Christopher Eccleston and Alice Krige.