Adam Scott

Tom

Toni Collette

Sarah

David Koechner

Howard

Allison Tolman

Linda

Conchata Ferrell

Aunt Dorothy

Emjay Anthony

Max

Stefania LaVie Owen

Beth

Krista Stadler

Omi

Leith Towers

Derek

Curtis Vowell

DHL Man

Luke Hawker

Krampus

Seth Green

Lumpy (voice)

Breehn Burns

Dumpy (voice)

Justin Roiland

Clumpy (voice)

Ravi Narayan

Kertasníkir

Gareth Ruck

Stekkjarstaur

Ivy George

Perchta the Cherub (voice)

Collin Dean

Ruprecht the Elf (voice)

Gideon Emery

Krampus (voice) (uncredited)