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)