Halle Bailey
as Ariel

Jonah Hauer-King
as Prince Eric

Daveed Diggs
as Sebastian (voice)

Awkwafina
as Scuttle (voice)

Jacob Tremblay
as Flounder (voice)

Noma Dumezweni
as Queen Selina

Javier Bardem
as King Triton

Melissa McCarthy
as Ursula

Art Malik
as Sir Grimsby

Jessica Alexander
as Vanessa

Emily Coates
as Rosa

Jude Akuwudike
as Joshua

Russell Balogh
as Triton Guard #1

Adrian Christopher
as Triton Guard #2

Simone Ashley
as Indira

Martina Laird
as Lashana

John Dagleish
as Mulligan

Sienna King
as Tamika

Karolina Conchet
as Mala

Lorena Andrea
as Perla

Kajsa Mohammar
as Karina

Nathalie Sorrell
as Caspia

Jodi Benson
as Market Vendor

Christopher Fairbank
as Hawkins

Matthew Carver
as Cabin Boy

Julz West
as Hat Vendor

Shay Barclay
as Coconut Seller / Dancer

Arina Li
as Flower Vendor

Leon Cooke
as Core Dancer

Tarik Frimpong
as Core Dancer

Chris George
as Core Dancer

Yasmin Harrison
as Core Dancer

Erica Stubbs
as Core Dancer

Kate Thompson
as Core Dancer

Jonathan Bishop
as Dancer

Aaron Bryan
as Dancer

Sophie Carmen-Jones
as Dancer

Jon-Scott Clark
as Dancer

Cameron Valentina
as Dancer

Austyn Farrell
as Dancer

Cecil Jee
as Dancer

Ben Hukin
as Dancer

Andrew Lyle-Pinnock
as Dancer

Chanel Mian
as Dancer

Ebony Molina
as Dancer

Ian Oswald
as Dancer

Oliver Ravelin
as Dancer

Charles Ruhrmund
as Dancer

Nicole Valverde
as Dancer

Craig Stein
as Dancer

Sasha Watson Lobo
as Dancer

Johnny White
as Dancer

Charlotte Wilmott
as Dancer

Bobby Windebank
as Dancer

Marcus Hodson
as Merfolk

Gary the Labradoodle
as Max

Taitum Pitfield
as Merkid

Ayo Hana
as Stallholder (uncredited)