Yahya Abdul-Mateen II
Black Manta
Dolph Lundgren
King Nereus
Martin Short
Kingfish (voice)
John Rhys-Davies
Brine King (voice)
Natalia Safran
Council Lady
Samuel Gosrani
Mercenary Tech
Grant Huggair
Surface Dweller
Osian Roberts
Atlantean Fighter Pilot #2
Jonny Vaughton
Atlantean Fighter Pilot #1
Jay McDonald
Ocean Freighter Captain
Jonathan Bremner
Octobot Mercenary #1
Jack Waldouck
Octobot Mercenary #2
Maddox Cruz-Porter
Junior Baby
River Ao Moemoeā Green
Junior Baby
Nikau Keats Green
Junior Baby
Elliot Oben-Perpa
Junior Baby
Lucian Oben-Perpa
Junior Baby
Arthur Rowe-Mayer
Junior Baby
Noah Rowe-Mayer
Junior Baby
Jon Birkbeck
Orm Suit Performer
Michael Beach
Jesse Kane (archive footage) (uncredited)
Michael Oladele
Marine Warrior (uncredited)