Brian Cox as Santa (voice)

Bill Nighy as Lighthouse Bill (voice)

Fiona Shaw as Ms. Trapper (voice)

Jack Wisniewski as Danny Williams (voice)

Jodie Whittaker as Mrs. Williams (voice)

India Brown as Bernadette McNutt (voice)

Guz Khan as Dasher (voice)

Lolly Adefope as Mrs. McNutt (voice)

Zazie Hayhurst as Sam Beccles (voice)

Sienna Sayer as Charlie Beccles (voice)

Alex MacQueen as Mr. Forrest (voice)

Katherine Parkinson as Mrs. Forrest (voice)

Sindhu Vee as Mrs. Mulji (voice)

Rosie Cavaliero as Mrs. Beccles (voice)

Paul Kaye as Yirrell (voice)

Andy Nyman as Mr. Beccles (voice)

Kuhu Agarwal as Nisha Mulji (voice)

Bronte Smith as Eve McNutt (voice)

Freddie Spry as Teddy Forrest (voice)

Ava Talbot as Scarlett Forrest (voice)

Rhys Darby as Mr. McNutt (voice)

Deborah Findlay as Mrs. Horton (voice)

Alicia Davies as Weather Person (voice)

Isabella Hopkins as Additional Voices (voice)

Simon Otto as Additional Voices (voice)

Jordan North as Additional Voices (voice)

Dermot O'Leary as Additional Voices (voice)

Luke Jameson as Additional Voices (voice)

Mary Moss as Additional Voices (voice)