Jason Momoa worked with a coach to speak Hawaiian authentically in 'Chief of War'

Jason Momoa drove a vintage pickup along a winding country road in Hawaii, a tattooed arm dangling out the window and Metallica blasting. Momoa was preparing for his role in “Chief of War,” the first major TV series featuring the language and culture of Hawaii's Indigenous people. Like many Native Hawaiians in Hawaii and elsewhere, Momoa didn't grow up speaking Hawaiian.