Wikimedia Commons/Hercules 2014 movie Movie Discover the surprising truth behind Dwayne Johnson's Hercules beard: it was made from yak testicle hair. A shocking Hollywood secret revealed. May 3, 2026 AceShowbiz - Hercules 2014 movie features Dwayne Johnson in the lead role, a performance that required not only intense physical preparation but also a unique approach to his character's appearance. Recently resurfaced footage has revealed a surprising detail about Dwayne Johnson's iconic beard in the film: it was made from yak testicle hair.