David Tennant as Donald / Roderick Peterson

Marc Wootton as Mr. Poppy

Pam Ferris as Mrs. Bevan

Jessica Hynes as Angel Matthews

Joanna Page as Mrs. Sarah Peterson

Jason Watkins as Gordon Shakespeare

Ian McNeice as Mr. Peterson's Dad

Ben Wilby as Bob

Brandon McDonald as Oli

Rosie Cavaliero as Miss Rye

Pixie Davies as Pixie

George Potts as Supply Teacher 1

Claire Vousden as Supply Teacher 2

Amanda Lawrence as Supply Teacher 3

Adrianna Bertola as Mr. Shakespeare's Class

Scott Folan as Mr. Shakespeare's Class

Eleanor Grant as Mr. Shakespeare's Class

John Dalziel as Judge

Sally Hill as Judge

Neil Parkinson as Judge

Sarah Pelling as Judge

Shannon Maguire as Mr. Shakespeare's Class

Lloyd Ellis Cornish as Snow Angels Lead Singer

Daisy Donohoe as Snow Angel

David Prince as Snow Angel

Georgina Feller as Christmas Puddings Lead Singer

Libby Feller as Christmas Puddings Lead Singer

Libby Wilson as Christmas Pudding

Lucie Croke as Christmas Pudding

Lydia Taylor as Christmas Pudding

Sophie Aird as Christmas Pudding

Sophie Bird as Christmas Pudding

Sophie Malone as Christmas Pudding

Zoe Davidson as Christmas Pudding

Caitlin Cronin as Lucy

Dominic McKernan as Dan

Ellie Coldicutt as Beth

Faye Dolan as Jade

Jesse Donohoe as Jesse

Joe Lane as Edward

Joseph West as Joseph

Joshan Patel as Bill

Kyle Johnson as Tommy

Louise Blunt as Little Lucy

Maeve Dolan as Sam

Mason Daw as Mason

Mason Simpkins as Mason

Michael McAuley as William

Milly Webb as Neve

Morgan Brennan as Charlotte

Reece Stowe as Fraser

Sydney Isitt-Ager as Sadie