When Peter Hall posted news yesterday (complete with photos) about rapper Curtis "50 Cent" Jackson losing 54 pounds off his chiseled physique to play a football player who gets cancer in Things Fall Apart, it got us thinking about other radical transformations actors have undergone for roles. Like Peter mentions, losing weight or altering your appearance for a part doesn't guarantee a great performance, but it does certainly show how dedicated an actor is to their craft. So, with that in mind, here are some of the greatest onscreen transformations in movie history. It has become more common in recent years for actors to show this level of commitment to a role, but I've chosen the ones that stand out as the most amazing to me. When you're done reading about my picks, I hope you'll head to the comments section and share some of your own favorite "performance-inspired makeovers."