8 Stars Who Underwent Dramatic Transformations for a Movie Role

Many people see acting as a simple job that almost anyone can do, but this domain requires more sacrifice and effort than you might think. Acting is not only about wearing certain outfits, crying instantly or becoming someone else by changing your personality and learning a speech. There are certain actors who underwent dramatic transformations to play a role in a film. Of course, we are not talking about those stars who had to let their hair grow on their bodies or to cut their hair entirely, but about those actors who had to completely change their lifestyle and diet.
The weight loss process should be gradual and healthy if you want to avoid certain health problems, sagging skin, or stretch marks. People who want to gain weight should eat healthy foods to avoid fat deposition or certain diseases, and individuals who want to increase their muscle mass should not only have daily workouts but also consume only certain foods that stimulate muscle growth.
What about Robert Deniro in Raging Bull ?