Eric Dane as King Triton of Oceania

Angela Bassett as Queen Sarah of Oceania

Eleanor Morrison-Halliday as Princess Cordelia of Oceania

Hannah Lowther as Princess Athena of Oceania

Billie Bowman as Princess Morgan of Oceania

Mary-Jean Caldwell as Princess Marina of Oceania

May Tether as Princess Kailani of Oceania

Olivia Moore as Princess Lyra of Oceania

Olivia Rodrigo as Princess Indigo of Oceania

Miracle Chance as Heiress Veronica Sawyer of Sapphire Vale

Ellis Kirk as Heir Jason "JD" Dean of Tiger Eye Valley

Olivia Barnett-Legh as Princess Heather Chandler of Ruby Haven

Kia Paris-Walcott as Heiress Heather Duke of Emeraude

Katharine Pearson as Heiress Heather McNamara of Topaz Heights

Merrin Dungey as Ursula the Sea Witch

Aisha Tyler as Morgana the Sea Witch