Brenda Blethyn

Aunt Millie

Christopher Plummer

Santa Claus

Kevin Pollak

Archimedes

Whoopi Goldberg

Blizzard (voice)

Brittany Bristow

Erin Scott-Pierce

Leif Bristow

Blitzen (voice)

Jacqueline Byers

Skating girl (as Jackie Byers)

Josh Buckle

Jack Andrews