Ralph Fiennes

Barry (voice)

Octavia Spencer

Dab-Dab (voice)

Emma Thompson

Poly (voice)

Robert Downey Jr.

Dr. John Dolittle

Antonio Banderas

King Rassouli

Selena Gomez

Betsy (voice)

Marion Cotillard

Tutu (voice)

Kumail Nanjiani

Plimpton (voice)

John Cena

Yoshi (voice)

Tom Holland

Jip (voice)

Jim Broadbent

Lord Thomas Badgley

Craig Robinson

Kevin (voice)

Michael Sheen

Dr. Blair Müdfly

Jessie Buckley

Queen Victoria

Jason Mantzoukas

James the Dragonfly (voice)

Ralph Ineson

Arnall Stubbins

Joanna Page

Bethan Stubbins

Stephen Gaghan

Director

Harry Collett

Tommy Stubbins

Rami Malek

Chee-Chee (voice)

Kasia Smutniak

Lily Dolittle

Carmel Laniado

Lady Rose

Frances de la Tour

Dragon (voice)

Sonny Ashbourne Serkis

Arnall Stubbins Jr.

Oliver Chris

Sir Gareth

Jon Mone

Executive Producer