Australian actor Chris Hemsworth is on track to becoming a huge star in America thanks to his role in the movie Thor but gaining 20 pounds to play the lead in the movie was not as much fun as you would expect. Hemsworth tells Men’s Health in its May issue that the key to his weight gain was non-stop food consumption and weight lifting. The actor, who had never lifted weights until he filmed the action flick, says he found eating tons of food especially when he was not hungry very exhausting. Thor opens in theaters on May 6.