The Daily Mail has debuted this new, albeit small Chris Hemsworth in Thor, opening in 3D and 2D theaters on May 6. Natalie Portman, Tom Hiddleston, Anthony Hopkins, Rene Russo, Stellan Skarsgard, Jaimie Alexander, Kat Dennings, Ray Stevenson, Josh Dallas, Tadanobu Asano, Idris Elba, Clark Gregg, Colm Feore and Samuel L. Jackson co-star in the Kenneth Branagh-directed film.