Marvel has the cast listed like this:
Chris Hemsworth (Thor), Tom Hiddleston (Loki), Anthony Hopkins (Odin), Natalie Portman (Jane Foster), Stuart Townsend (Fandral), Tadanobu Asano (Hogun) and Ray Stevenson (Volstagg). Kenneth Branagh will direct.    Latest edition is Kat Dennings . Rumor is she is gonna play Jane Foster's Co-worker. Where is the Enchantress, she doesn't need to fit in as a love interest yet. :) I like it, The more I see of Asgard the better the movie will be. Hopefully we don't see the Thor who is squeamish about violence, be real he's a model viking. :)