Dwayne Johnson stars as former wrestler and UFC star Mark Kerr in a new trailer for Benny Safdie's "The Smashing Machine."

Dwayne "The Rock" Johnson transforms into MMA and UFC fighter Mark Kerr in Benny Safdie's A24 biopic "The Smashing Machine," releasing this fall.

The Smashing Machine trailer explores MMA fighter Mark Kerr's life as a UFC fighter and navigates his relationship with Dawn, played by Emily Blunt. The trailer also teased Mark’s struggles with addiction to painkillers.