James Wan Director Jason Momoa Arthur Actor Amber Heard Mera Actor Willem Dafoe Vulko Actor Patrick Wilson King Orm Actor Nicole Kidman Atlanna Actor Dolph Lundgren King Nereus Actor Yahya Abdul-Mateen II Manta Actor Temuera Morrison Tom Curry Actor Ludi Lin Captain Murk Actor Michael Beach Jesse (Manta's Father) Actor Randall Park Dr. Stephen Shin Actor Graham McTavish King Atlan Actor Leigh Whannell Cargo Pilot Actor Tainui Kirkwood Young Arthur (Three Years Old) Actor Tamor Kirkwood Young Arthur (Three Years Old) Actor Denzel Quirke Young Arthur (Three Years Old) Actor Kaan Guldur Young Arthur (Nine Years Old) Actor Otis Dhanji Young Arthur (Thirteen Years Old) Actor Kekoa Kekumano Young Arthur (Sixteen Years Old) Actor Julie Andrews Karathen Voice John Rhys-Davies Brine King Voice Djimon Hounsou King Ricou Voice Andrew Crawford Brine King, King Ricou Actor Sophia Forrest Fisherman Princess Actor Natalia Safran Queen Rina Actor David Leslie Johnson-McGoldrick Screenwriter Will Beall Screenwriter Peter Safran Producer Rob Cowan Producer Deborah Snyder Executive Producer Zack Snyder Executive Producer Jon Berg Executive Producer Geoff Johns Executive Producer Walter Hamada Executive Producer Don Burgess Cinematographer Kirk M. Morri Film Editing Rupert Gregson-Williams Original Music Bill Brzeski Production Design Richard Hobbs Supervising Art Direction Desma Murphy Art Director Michelle McGahey Art Director Eugene Intas Art Director Bill Booth Art Director Peter Wyborn Art Director Beverley Dunn Set Decoration Kym Barrett Costume Design Anne McCarthy Casting Kellie Roy Casting