America Young

as Malibu (Barbie) (voice)

Tatiana Varria

as Brooklyn (Barbie) (voice)

Kirsten Day

as Skipper (voice)

Cassandra Lee Morris

as Stacie / Mermaid 1 (voice)

Natalie Lashkari

as Chelsea (voice)

Melanie Minichino

as Marlo / Mermaid 2 (voice)

Madelyn Kratzer

as Aquaryah Aquavilla (voice)

Tiana Camacho

as Talleigha Fishtail (voice)

Vivian Lu

as Isla / Dr. Tang (voice)

Johnny Yong Bosch

as Finn / Waiter (voice)

Cassidy Naber

as Sareena Seasquid (voice)

Angela Lee Sloan

as Coralia / Angler Fish (voice)

Jabez Zuniga

as Oslo (voice)