Sam Fell Director Thandiwe Newton Ginger Voice Zachary Levi Rocky Voice Bella Ramsey Molly Voice Romesh Ranganathan Nick Voice Daniel Mays Fetcher Voice Jane Horrocks Bunty Voice Imelda Staunton Bunty Voice Lynn Ferguson Mac Voice Josie Sedgwick-Davies Frizzle Voice Nick Mohammed Dr. Fry Voice Karey Kirkpatrick Screenwriter, Executive Producer Rachel Tunnard Screenwriter John O'Farrell Screenwriter Steve Pegram Producer Leyla Hobart Producer David Sproxton Executive Producer Peter Lord Executive Producer Carla Shelley Executive Producer Nick Park Executive Producer Paul Kewley Executive Producer Charles Copping Cinematographer Sim Evan-Jones Film Editing Stephen Perkins Film Editing Harry Gregson-Williams Original Music Darren Dubicki Production Design Richard Edmunds Art Director Sarah Hauldren Art Director Matt Perry Art Director Gary J. Losh Set Decoration Lucy Rands Casting