Halle Bailey Ariel Jonah Hauer-King Prince Eric Daveed Diggs Sebastian (voice) Awkwafina Scuttle (voice) Jacob Tremblay Flounder (voice) Noma Dumezweni Queen Selina Javier Bardem King Triton Melissa McCarthy Ursula Art Malik Sir Grimsby Jessica Alexander Vanessa Emily Coates Rosa Jude Akuwudike Joshua Russell Balogh Triton Guard #1 Adrian Christopher Triton Guard #2 Simone Ashley Indira Martina Laird Lashana John Dagleish Mulligan Sienna King Tamika Karolina Conchet Mala Craig Stein Dancer / Puppeteer Lorena Andrea Perla Kajsa Mohammar Karina Nathalie Sorrell Caspia Jodi Benson Market Vendor Christopher Fairbank Hawkins Leon Cooke Core Dancer Tarik Frimpong Core Dancer Yasmin Harrison Core Dancer Sophie Carmen-Jones Dance Jon-Scott Clark Dancer Craig Stein Dancer