Brianna Gentilella

Molly (singing voice)

Jacob Bertrand

Gil (voice)

Tino Insana

Mr. Grouper (voice)

Frank Welker

Bubble Puppy (voice)

Bailey Gambertoglio

Molly (voice)

Marleik 'Mar Mar' Walker

Goby (voice)

Grace Kaufman

Deema (voice)

Tori Feinstein

Oona (voice)

Jet Jurgensmeyer

Nonny (voice)