He's Clark Kent, The Man of Steel and Superman, but in real life he's just Henry Cavill. So if you're wondering how the actor transformed from human to superhero, we have all the brutal details! At Monday night's Man of Steel premiere the actor dished on the process of getting in shape. He said it involved mass building followed by leaning down. And of course came the diet change-- Henry said he had to cut his calories in half! From what we see, Henry's hard work paid off! Man of Steel is now playing!