Josh Brolin has come aboard to narrate the documentary Unchained: The Untold Story of Freestyle Motocross.
The Sicario actor will also executive produce the film, which is currently in post-production. Brian O'Shea's The Exchange will introduce the film to buyers at the upcoming American Film Market.
The doc will follow the birth and boom of the extreme sport. Paul Taublieb, one of the creators of the X Games, wrote, produced and directed Unchained alongside motocross filmmaker Jon Freeman, who co-directed and co-produced.
Unchained will feature interviews with some of the biggest stars of extreme sports, including Carey Hart, Tony Hawk, Travis Pastrana and Mike Metzger.
In addition to Brolin, O'Shea, Susan Cooper, Jeff Bowler and Nat McCormick will executive produce.