10. Aaron Taylor-Johnson
When Taylor-Johnson landed Kick-Ass in 2010, he’d been playing mostly in TV roles, but nothing stood out. His role in Kick-Ass was a superhero, but there was no transformation required. The character of Kick-Ass was an everyman-cum-hero sort. Then, director Joss Whedon decided to give him a shot at a more traditional superhero role as Quicksilver in Avengers: Age of Ultron. He was 175 pounds in the second Kick-Ass movie, which was up from the first, but then he gained another 15 pounds by the time he was in Godzilla. Avengers hit screens between those two films.