Nick Moore Director Olivia Colman Nelly Actor David Walliams Pudsey Voice Izzy Meikle-Small Molly Actor Jessica Hynes Gail Actor Jim Tavaré The Dog Catcher Actor John Sessions Thorne Actor Maggie Steed Mrs. Willoughby Actor Luke Tittensor Will Actor Paul Rose Screenwriter Jamie Carmichael Executive Producer Allan Niblo Executive Producer James Richardson Executive Producer Mark Brittain Executive Producer Michael Ford Producer Rupert Preston Producer Marshall Leviten Producer Simon Woodgate Original Music Ali Asad Cinematographer Dan Farrell Film Editing Dixie Chassay Casting Kristian Milsted Production Design Philip Barber Art Director