Sarah Smith Director, Screenwriter James McAvoy Arthur Voice Hugh Laurie Steve Voice Bill Nighy Grandsanta Voice Jim Broadbent Santa Voice Imelda Staunton Mrs. Santa Voice Ashley Jensen Bryony Voice Marc Wootton Peter Voice Laura Linney North Pole Computer Voice Eva Longoria Chief De Silva Voice Ramona Marquez Gwen Voice Michael Palin Ernie Clicker Voice Sanjeev Bhaskar Lead Elf Voice Robbie Coltrane Lead Elf Voice Joan Cusack Lead Elf Voice Rhys Darby Lead Elf Voice Jane Horrocks Lead Elf Voice Iain McKee Lead Elf Voice Andy Serkis Lead Elf Voice Dominic West Lead Elf Voice Peter Baynham Screenwriter Peter Lord Producer David Sproxton Producer Carla Shelley Producer Steve Pegram Producer James Cooper Film Editing John Carnochan Film Editing Harry Gregson-Williams Original Music Evgeni Tomov Production Design Olivier Adam Art Director Alexei Nechytaylo Art Director Sarah Crowe Casting Mary Hidalgo Casting