Makeup and special effects are all a part of the movie magic, but without the actors, a vital part of the experience would be missing. When I go to the movies or see something on T.V. I want to fully believe that the actor I’m watching is actually the character they’re playing. These 12 actors have convinced the audience that they are a completely different person, so much so that you won’t believe it when you find out who they really are. From makeup to losing or gaining weight, to the psychological transformation, these actors held nothing back and put it all in to prove their dedication to the film industry. Some experienced health issues and made hefty body modification when the pretend stuff just wasn’t enough. How many actors can you recognize once in full costume?