14. Tom Hardy
Everyone knows how dedicated Tom Hardy is, especially with his various figures for different roles he took up in movies like The Dark Knight Rises, Mad Max: Fury Road, and Legend. But his iconic character portrayal was that of Bane, for which he had to gain over 40 lbs soon after filming for Band of Brothers, where he had a slim figure. In fact, he gained this weight within just 3 months’ time. It is astonishing to see actors go through such physical discomfort to make their characters so real.