We’ve all seen films where the stars undergo extensive character transformations that leave them barely resembling what we’re used to seeing. But what process does it take to get them there? We’ve ransacked the film and TV library to find incredible character transformations and behind-the-scenes footage of actors mid-prosthetic dressing. We’re taking a look behind the smoke and mirrors to reveal the best makeup and prosthetic technicians at work on some of our favorite movie stars. From silicone face masks to hyperrealistic hairlines, we guarantee you have not seen these Hollywood heavyweights like this before!