Chris Hemsworth has Thor 'phwoar' factor

Chris Hemsworth brings the "phwoar" factor to 'Thor'.

Kenneth Branagh - who has directed the epic movie about the titular character who is cast out to live amongst humans - believes Australian actor Chris is the perfect casting in the lead role because he is so handsome.

He said: "I've been in the audience when the phwoars kick off. He is able to bring to this god all the physical beauty and magnificence he can muster

"He's got romance, he's got humour - and he's got a twinkle in his eye. He also has what the part needs, he can be quite primal. There's a compelling mixture of things and he absolutely answers the brief of what a god/superhero should be."

He also reveals Natalie Portman - who is also in the movie - was in full rehearsals for 'Black Swan' when she agreed to take part, and whenever he spoke to her she was always exercising.

Kenneth added to the Daily Mail: "We delivered the script to her while she was taking a ballet class. She was eight months into preparation for 'Black Swan' and prepared for 'Black Swan' during rehearsals for us.

"I never rehearsed with Natalie without her leg being up over her head.

"Any time I gave her a note, she was leaning against a wall with her toe over the top of her head. It was fantastically impressive."