Although many of the characters in Thor are mythical characters, the production team still looks for real actors to play these roles, but only a few actors fit these classic Marvel comics. In the end, Chris Hemsworth was selected to play Thor. The producer thinks that he "has a good posture and a sense of humor, and he reads his lines in a very sincere way", "He is tall and strong, and he has an idea of how to interpret this character, and he has the ability to explore the original side of this character." .
The character Jane was a nurse in the original comic story, but the film crew wanted her to meet the conditions of a modern woman, so she was portrayed as an astrophysicist and a very beautiful research scholar. This requires a beautiful and smart actress with first-rate acting skills. Natalie Portman's kind of intellectual and emotional actress is very consistent with the result. Natalie Portman is also very interested in this film. Although she is not a fan of Marvel Comics, she has always wanted to collaborate with director Kenneth Branagh. She met several times and the result of the discussion was that Jane shouldn’t be the typical beauties in superhero movies, but The key role that made Thor become a real superhero. But Natalie Portman has only finished filming her most difficult role so far, that is, the ballet dancer in "Black Swan". She has received a full year of dance training for that movie, and she does not want to perform another scale. Huge action-adventure movie.
