Jason Momoa: Arthur Curry / Aquaman
Patrick Wilson: King Orm / Ocean Master
Yahya Abdul-Mateen II: Black Manta
Amber Heard: Mera
Nicole Kidman: Atlanna
Randall Park: Dr. Stephen Shin
Temuera Morrison: Tom Curry
Dolph Lundgren: King Nereus
Martin Short: Kingfish
Jani Zhao: Stingray
Pilou Asbæk: Kordax
Indya Moore: Karshon
John Rhys-Davies: Brine King (Digi) (voice)
Vincent Regan: Atlan