Sarah Smith Director, Screenwriter, Executive Producer Jean-Philippe Vine Director Octavio E. Rodriguez Additional Voice Director, Voice, Co-Director Jack Dylan Grazer Barney Pudowski Voice Zach Galifianakis Ron Voice Ed Helms Graham Pudowski Voice Olivia Colman Donka Voice Rob Delaney Andrew Morris Voice Justice Smith Marc Voice Kylie Cantrall Savannah Meades Voice Ricardo Hurtado Rich Belcher Voice Marcus Scribner Stanley Tubman Voice Thomas Barbusca Philip Voice Cullen McCarthy Noah Voice Ava Morse Ava Voice Sarah Miller Bree Voice Bentley Kalu Cop Voice Krupa Pattani Sita Voice John Macmillan Bubble Techs Voice Megan Maczko Miss Thomas Voice Ruby Wax Ms Hartley Voice David Menkin Shayne the Biker & Mr Cleaver Voice Iara Nemirovsky Ellie Voice Liam Payne Additional Voice Voice Flula Borg Additional Voice Voice Tristan Allerick Chen Additional Voice Voice Chelsea Devantez Additional Voice Voice Audrey Hsieh Additional Voice Voice Youssef Kerkour Additional Voice Voice Phil LaMarr Additional Voice Voice Iain McKee Additional Voice Voice Andre Robinson Additional Voice Voice Peter Baynham Screenwriter, Executive Producer Julie Lockhart Producer Lara Breay Producer Elisabeth Murdoch Executive Producer David Peers Cinematographer Hailey White Cinematographer David Burrows Film Editor James Cooper Film Editor Sim Evan-Jones Film Editor Henry Jackman Original Music Nathan Crowley Production Design Karen deJong Art Director Christian Kaplan Casting