The Smashing Machine,” written and directed by Benny Safdie, stars Dwayne Johnson and Emily Blunt. The biopic will be released in October.

Dwayne Johnson transforms into UFC fighter Mark Kerr in A24's trailer for 'The Smashing Machine,' also starring Emily Blunt and directed by Benny Safdie.

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.