Some actors go to great lengths to prepare for roles. Look at Chris Pratt - the poor guy had to get insanely ripped and hot as hell!
But extreme weight gain and loss is relatively commonplace around Hollywood. What we're interested in are the times your favorite handsome humans beat the everloving f*ck out of their bodies for your entertainment.
Sure, they could
have just hired ugly people. But the important lesson here is that hot people are better at everything, even at being ugly