Filming on 'Thor 2' begins August 2012 in London, casting set to begin

[Alan Baltes]

Natalie Portman and Chris Hemsworth are both returning for "Thor 2".
Creative Commons

The next chapter in the Marvel Cinematic Universe, "Thor 2" is now in pre-production and the casting director in Los Angeles is getting ready to audition talent for new co-starring and supporting roles. The bulk of filming will take place in London, England with some additional filming in Los Angeles. There will also be auditions in London for principal acting roles. Extras, photo-doubles, and stand-ins will be hired in London and various areas of the United Kingdom. Filming on "Thor 2" will begin in August, 2012.

Details Here:

Casting Information for "Thor 2" Actors and Extras