Chris Hemsworth, Natalie Portman, Tom Hiddleston, Jaimie Alexander, Idris Elba and Stellan Skarsgard returns. Not sure if Anthony Hopkins returns as Odin though.
Christopher Eccleston will be the villain as Malekith, ruler of the Dark Elves.
Tom Hiddleston (Loki) on the film:
“I don't want to give too much away. But I can guarantee that you won't be disappointed. Alan Taylor's vision of Thor 2 is utterly brilliant. The journey continues in the most epic dimension and proportion imaginable. It's very, very exciting."