Before Chris Hemsworth was cast as Thor for the movies, several tall British actors were tested for the role. One of them was none other than Tom Hiddleston who plays Loki in the films.
Hiddleston said about his test as Thor. "Every English-speaking actor over 6 foot was being seen for the part. I got down to the final few, which also included Chris’s younger brother Liam Hemsworth (The Hunger Games), Alexander Skarsgård (True Blood), and Charlie Hunnam (Pacific Rim, Sons of Anarchy)."
Hiddleston said he trained hard to put on 20 pounds of muscle for the test. After he was rejected, director Kenneth Branagh, who knew Hiddleston, asked him to play Loki instead.
Click the "Yahoo Movies" link below to see a clip showing Tom Hiddleston playing Thor.