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

The first trailer for The Smashing Machine has arrived, and it's a gritty look at a UFC champ. In the footage, which you can watch above, Dwayne Johnson looks unrecognizable as MMA fighter and two-time UFC Heavyweight Tournament Champion Mark Kerr.

Dwayne "The Rock" Johnson's signature tattoos and bald head are nowhere to be seen in the first trailer for A24's upcoming biopic about a legendary athlete. In "The Smashing Machine,"Johnson transforms into mixed martial arts (MMA) and Ultimate Fighting Championship (UFC) fighter Mark Kerr,