Dwayne Johnson flaunts ripped gym muscles before 'Black Adam'

Dwayne Johnson is hitting the gym ahead of his upcoming movie.

The Rock has adapted major changes in his diet and exercises for the much-anticipated film Black Adam.

The 48-year-old actor took to his Instagram and shared a photo of himself soaking in sweat. He also showed off his buff muscles for the camera.

"Black Adam readd," he captioned with a thunder emoticon. "It's always the work we quietly put in when no one is watching that changes the game," 

"Grateful for the grind. (and the face of my Warrior Spirit always watching my back)," he wrote with hashtags "Black Adam," "DC Universe" and "Change The Game."