Brian Cox Santa (voice) Fiona Shaw Ms. Trapper (voice) Jodie Whittaker Mrs. Williams (voice) Bill Nighy Bill (voice) Lolly Adefope Mrs. McNutt (voice) Alex MacQueen Mr. Forrest (voice) Katherine Parkinson Mrs. Forrest (voice) Sindhu Vee Mrs. Mulji (voice) India Brown Bernadette McNutt (voice) Sienna Sayer Charlie Beccles (voice) Rosie Cavaliero Mrs. Beccles (voice) Paul Kaye Yirrell (voice) Guz Khan Dasher (voice) Andy Nyman Mr. Beccles (voice) Freddie Spry Teddy Forrest (voice) Rhys Darby Mr. McNutt (voice) Simon Otto Additional Voices (voice) Jordan North Additional Voices (voice) Dermot O'Leary Additional Voices (voice)