10. Ryan Reynolds
Way before Ryan Reynolds took on superhero roles like Green Lantern or Deadpool, he was a lanky fellow who did not care about his physical fitness. With rising fame, Reynolds made up his mind to get over his old eating habits and started focusing on building a more impressive physique for certain Hollywood roles. It all started when was offered a role in the movie Blade, which made Reynolds gain muscle mass of over 25 lbs and lose weight to look the part.