 Jason MomoaArthur Curry / Aquaman | Arthur Curry / Aquaman |
 Amber HeardMera | Mera |
 Willem DafoeNuidis Vulko | Nuidis Vulko |
 Patrick WilsonKing Orm Marius / Ocean Master | King Orm Marius / Ocean Master |
 Nicole KidmanAtlanna | Atlanna |
 Dolph LundgrenKing Nereus | King Nereus |
 Yahya Abdul-Mateen IIDavid Kane / Black Manta | David Kane / Black Manta |
 Temuera MorrisonThomas Curry | Thomas Curry |
 Ludi LinCaptain Murk | Captain Murk |
 Michael BeachJesse Kane (Manta's Father) | Jesse Kane (Manta's Father) |
 Randall ParkDr. Stephen Shin | Dr. Stephen Shin |
 Graham McTavishKing Atlan | King Atlan |
 Leigh WhannellCargo Pilot | Cargo Pilot |
 Tainui KirkwoodYoung Arthur (3 Years Old) | Young Arthur (3 Years Old) |
 Tamor KirkwoodYoung Arthur (3 Years Old) | Young Arthur (3 Years Old) |
 Denzel QuirkeYoung Arthur (3 Years Old) | Young Arthur (3 Years Old) |
 Kaan GuldurYoung Arthur (9 Years Old) | Young Arthur (9 Years Old) |
 Otis DhanjiYoung Arthur (13 Years Old) | Young Arthur (13 Years Old) |
 Kekoa KekumanoYoung Arthur (16 Years Old) | Young Arthur (16 Years Old) |
 Julie AndrewsKarathen (voice) | Karathen (voice) |
 John Rhys-DaviesBrine King (voice) | Brine King (voice) |
 Djimon HounsouKing Ricou (voice) | King Ricou (voice) |
 Andrew CrawfordBrine King / King Ricou (mocap) | Brine King / King Ricou (mocap) |
 Sophia ForrestFisherman Princess | Fisherman Princess |
 Natalia SafranQueen Rina | Queen Rina |
 Micah OhlmanNewscaster | Newscaster |
 Jack AndrewMike (Bully) | Mike (Bully) |
 Frankie Creagh-LeslieMatt (Bully) | Matt (Bully) |
 Sophia Emberson-BainTour Guide (Aquarium) | Tour Guide (Aquarium) |
 Ilya MelnikoffSubmarine Captain | Submarine Captain |
