Miritana was born in Rotorua, New Zealand, and is of Maori, Australian, Barbadian, and Welsh descent with Ngai Tuhoe, Ngati Manawa and Te Arawa tribal affiliations. A graduate of the Western Australian Academy of Performing Arts (WAAPA), he is known for AMC's Preacher (2019), BBC's Wakefield (2020), and Julie Taymor & Disney Theatrical's The Lion King (2003-2006).