Noah Jupe as Peter (voice)

Mandy Patinkin as Vilna Lutz (voice)

Brian Tyree Henry as Leo Matienne (voice)

Natasia Demetriou as Narrator / Fortune Teller (voice)

Sian Clifford as Gloria Matienne (voice)

Benedict Wong as Magician (voice)

Miranda Richardson as Madam LaVaughn (voice)

Kirby Howell-Baptiste as The Countess (voice)

Aasif Mandvi as The King (voice)

Pixie Davies as Adele (voice)

Dawn French as Sister Marie (voice)

Cherise Boothe as Yvette / Excited Woman (voice)

Katy Cavanagh as Various Characters (voice)

Stephen Kearin as Various Characters (voice)

Tom Kenny as Various Characters (voice)

Phil LaMarr as Fish Monger / Minister of Justice / Old Jailor / Sentry (voice)

John DiMaggio as Human Cannonball (voice)