Jason Momoa as Arthur Curry / Aquaman

Amber Heard as Mera

Willem Dafoe as Nuidis Vulko

Patrick Wilson as King Orm Marius / Ocean Master

Nicole Kidman as Atlanna

Dolph Lundgren as King Nereus

Yahya Abdul-Mateen II as David Kane / Black Manta

Temuera Morrison as Thomas Curry

Ludi Lin as Captain Murk

Michael Beach as Jesse Kane (Manta's Father)

Randall Park as Dr. Stephen Shin

Graham McTavish as King Atlan

Leigh Whannell as Cargo Pilot

Tainui Kirkwood as Young Arthur (3 Years Old)

Tamor Kirkwood as Young Arthur (3 Years Old)

Denzel Quirke as Young Arthur (3 Years Old)

Kaan Guldur as Young Arthur (9 Years Old)

Otis Dhanji as Young Arthur (13 Years Old)

Kekoa Kekumano as Young Arthur (16 Years Old)

Julie Andrews as Karathen (voice)

John Rhys-Davies as Brine King (voice)

Djimon Hounsou as King Ricou (voice)

Andrew Crawford as Brine King / King Ricou (mocap)

Sophia Forrest as Fisherman Princess

Natalia Safran as Queen Rina

Micah Ohlman as Newscaster

Jack Andrew as Mike (Bully)

Frankie Creagh-Leslie as Matt (Bully)

Sophia Emberson-Bain as Tour Guide (Aquarium)

Ilya Melnikoff as Submarine Captain

Hank Amos as Submarine Pirate

Kyryl Koltsov as Submarine Crew Member

Patrick Cox as Cue Ball

Luke Owen as Biker

Robert Longstreet as Professor James

Devika Parikh as Newscaster Morgan

Sonny Le as Metalsmith

Jon Fabian as Italian Vendor

Mabel Tamone as Italian Young Girl

Rita Dinardo as Italian Old Woman

Anthony Standish as Barfly

Nicolette Bianca as Italian Mother

Victor Leto as Flower Stall Vendor

Vincent B. Gorce as Italian Bell Father

Gabriella Petkova as Italian Bell Girl

Oriana Lacono as Italian Bell Mother

Pearl Grantham as Ancient Atlantean Woman

Noa Tsuchiya as Ancient Atlantean Child

Alice Lanesbury as Arthur's Teacher

Nicolas Bosc as Atlantean Soldier #1

Joshua Levinson as Atlantean Soldier #2

Jordy Campbell as Arthur's Classmate (uncredited)

Braden Lewis as Beachgoer (uncredited)