Dwayne Johnson is soon heading to theaters in what might be the most dramatic role of his career so far. In "The Smashing Machine," Johnson will play MMA and UFC fighter Mark Kerr, who was the subject of a 2002 HBO documentary that chronicled his substance abuse and explored the brutality of the sport to which he'd dedicated his life.

Dwayne “The Rock” Johnson steps out of the WWE ring and into the UFC Octagon in a new trailer for The Smashing Machine, where he portrays UFC icon Mark Kerr. Benny Safdie wrote and directed the movie, which also features Emily Blunt, Ryan Bader, Bas Ritten, and Oleksandr Usyk.