Stage veteran Tom Hiddleston has been cast as Loki, Thor's evil trickster-god brother, according to Variety.
In the comic books, Loki's ability to bend reality causes no end of trouble for the god of thunder. Loki also opposes the Avengers, a supergroup made up of Thor, Iron Man, Hulk and others. Marvel is planning to eventually connect its various individual superhero films in one star-studded Avengers-based movie.
'Thor's' release date is set for July 17, 2011. Kenneth Branagh will direct.