Peter Scolari / Billy - Lonely Boy
Brendan King / Pastry Chef (voice)
Andy Pellick / Pastry Chef (voice)
Josh Eli / Waiter (voice)
Mark Mendonca / Waiter (voice)
Rolondas Hendricks / Waiter (voice)
Mark Goodman / Waiter (voice)
Jon Scott / Waiter (voice)
Gregory Gast / Waiter (voice)
Sean Scott / Waiter (voice)
Gordon Hart / Waiter (voice)
Michael Jeter / Smokey (voice)
Chris Coppola / Toothless Boy (voice)
Julene Renee / Red Head Girl (voice)
Michael Jeter / Steamer (voice)
Chris Coppola / Elf (voice)
Julene Renee / Elf (voice)
Charles Fleischer / Elf General (voice)
Steven Tyler / Elf Lieutenant (voice)
Steven Tyler / Elf Singer (voice)
Phil Fondacaro / Elf (voice)
Debbie Lee Carrington / Elf (voice)
Mark Povinelli / Elf (voice)
Ed Gale / Elf (voice)
Dante Pastula / Little Boy (voice)
Daryl Sabara / Hero Boy (voice)
André Sogliuzzo / Smokey (voice)
André Sogliuzzo / Steamer (voice)
Jimmy Bennett / Lonely Boy (voice)
Isabella Peregrina / Sister Sarah (voice)
Eric Newton / Acrobatic Elf (voice)
Aaron Hendry / Acrobatic Elf (voice)
Aidan O'Shea / Acrobatic Elf (voice)
Kevin C. Carr / Acrobatic Elf (voice)
Bee Jay Joyer / Acrobatic Elf (voice)
Jena Carpenter / Acrobatic Elf (voice)
Karine Mauffrey / Acrobatic Elf (voice)
Elisabeth P. Carpenter / Acrobatic Elf (voice)
Bill Forchion / Acrobatic Elf (voice)
Devin Henderson / Acrobatic Elf (voice)
Sagiv Ben-Binyamin / Acrobatic Elf (voice)
Josh Hutcherson / Hero Boy (voice)
Ashly Holloway / Sister Sarah (voice)
Jimmy 'Jax' Pinchak / Know-It-All (voice)
Chantel Valdivieso / Hero Girl (voice)
Hayden McFarland / Lonely Boy (voice)
Connor Matheus / Toothless Boy (voice)
Evan Sabara / Young Boy (voice)

Paul Vogt / Various
Stephnie Weir / Various
Lance Armstrong / Self
Philip Bailey / Self
Aaron Carter / Self
Chingy / Self
Sheryl Crow / Self
Gloria Estefan / Self
Nick Lachey / Self
Tommy Lee / Self
Nathan Morris / Self
Wanya Morris / Self
Dave Navarro / Self
Nelly / Self
Isabella Peregrina / Valerie
Colleen Reid / Self
Tara Reid / Self