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

Dwayne Johnson undergoes his most dramatic on-screen transformation yet in the first trailer for “The Smashing Machine,” a biopic about two-time UFC heavyweight champ Mark Kerr. A24 pulled the curtain back on the drama Tuesday morning.

In the first official trailer for the film, released by A24, Johnson takes on the role of Mark Kerr, a UFC fighter whose rise to fame was just as brutal as his fall.