When Rob Pattinson (who also played Cedric Diggory in the fourth "Harry Potter" film) was cast as a super sexy vampire in the film version of the hit "Twilight" book series, he decided to get serious about his level of fitness (perhaps taking a cue from his villainous co-star?).

He cut out all alcohol and a lot of his meals, hoping to rid his body of "every ounce of body fat." He kickboxed three hours a day and ran for at least two hours a day for more than two months, saying that he hoped, "... when I took off my shirt, I would look like an alien. I thought that kind of worked for the story. The idea of taking my shirt off and looking like some sort of Adonis ..."

But, it didn't work for the director -- Pattinson lost so much weight that the shirtless scenes were cut. It didn't seem to bother him too much, though. Once he knew the shirtless scenes were out, he went about putting some of that weight back on by starting "a full cheeseburger diet."