Duke Cutler as Gumball Watterson (voice)

Christian J. Simon as Darwin Watterson (voice)

Adam Long as Mr. Small (voice)

Garrick Hagon as Mayor of Elmore (voice)

Sandra Dickinson as Granny Jojo / Banana Barbra (voice)

Kerry Shale as Larry/Bobert/Leslie/Hector

Teresa Gallagher as Nicole Watterson / Penny / Margaret Robinson (voice)

Steve Furst as Nigel Brown

Dan Russell as Richard/Patrick/Chicken Bucket/Marvin

Alex Jordan as Hot Dog Guy

Kyla Rae Kowalewski as Anais Watterson

Mic Graves as Banana Joe

Hugo Harold-Harrison as

Stefan Ashton Frank as

Simon Lipkin as Rocky

Charles Philipp as Rob (voice)