Plot details are being held under wraps, but the studio is planning on expanding her role as Jane Foster's (Natalie Portman) sidekick in the film.
Alan Taylor is directing from a script by Don Payne and Robert Rodat.
Production will begin this fall in London.
Thor: The Dark World comes to theaters November 8th, 2013 and stars Chris Hemsworth, Natalie Portman, Ray Stevenson, Kat Dennings, Anthony Hopkins, Tom Hiddleston, Idris Elba, Christopher Eccleston. The film is directed by Alan Taylor.