Bill Hader

The Cat in the Hat (voice)

Xochitl Gomez

Gabby (voice)

Tiago Martinez

Sebastian (voice)

Matt Berry

Waffles the Fish (voice)

Quinta Brunson

Sherrie (voice)

Bowen Yang

Gary (voice)

America Ferrera

Carmen (voice)

Paula Pell

Patty (voice)

Tituss Burgess

The Psychic Narwhal (voice)

Giancarlo Esposito

Mr. Hoogeboom (voice)

Thomas Middleditch

Thing One (voice)

Robin Åkerstrand

Sven (voice)