Tom Hanks: Cast Away
Production on the 2000 film Cast Away halted for a year so that Tom Hanks could lose over 50 pounds... and grow out his hair. Moviegoers are easily duped, but it would have been tough to convince folks to believe a man with love handles had been stranded on a deserted island for several years.
"The hardest thing was the time," Tom revealed to TalkTalk. "I wish I could have just taken a pill and lost all the weight [...]. The idea of looking at four months of constant vigilance as far as what I ate, as well as two hours a day in the gym doing nothing but a monotonous kind of work-out, that was formidable. You have to power yourself through it almost by some sort of meditation trickery. It's not glamorous."