Chris Hemsworth, who stars as the title character in “Thor,” arrives at the film’s world premiere at Event Cinemas George Street in Sydney, Australia, on April 17, 2011. (Brendon Thorne / Getty Images)
Jaimie Alexander strikes a pose on the red carpet at the “Thor” premiere. Alexander plays Sif, a warrior goddess, in the film. (Brendon Thorne / Getty Images)
Director Kenneth Branagh smiles for the cameras at the world premiere of “Thor.” (Brendon Thorne / Getty Images)
Tom Hiddleston pauses for pictures on the red carpet. Hiddleston plays Thor’s adopted brother and supervillain Loki in “Thor” and in the upcoming movie “The Avengers.” (Brendon Thorne / Getty Images)
Jaimie Alexander poses for photos at the “Thor” premiere. (Rob Griffith / Associated Press)
