Former Marine Aaron Williamson is a fitness pro whose clientele includes Dwayne Johnson—someone whose physique has played a huge role in his career—and apparently, uh, J.K. Simmons, the 61-year-old Oscar winner who is working out hard for his role as Commissioner Gordon in Zack Snyder’s now-filming Justice League movie.
Source: io9 – Uh, Why Is J.K. Simmons Getting Terrifyingly Ripped for the Justice League Movie?