When Nicole Kidman first appeared onscreen in the 2002 film The Hours, all viewers could see was Virginia Woolf, the woman she was portraying. Her convincing performance was greatly supported by her makeup, including the famous prosthetic nose she had on, and it worked wonders. That’s the power of a physical alteration.Whether it's pounds of muscle, layers of tattoos or hundreds of pounds, major physical transformations have always come in handy for actors trying to nail their roles. Below, we look at some of the most memorable metamorphosis Hollywood has ever produced.