JP Karliak as Boss Baby (voice)

Pierce Gagnon as Tim (voice)

Amaryllis Aubel as French Girl (voice)

Jodi Benson as Lala Doo-Da (voice)

Alex Cazares as Staci (voice)

Kalen Chase as Diddly Doo (voice)

Ray Chase as Ding Dong Dongle (voice)

David W. Collins as Dad (voice)

Dana Davis as Jingly Jangly (voice)

Charles Dewayne as Tippy Tappy Sloppy (voice)

Mary Faber as Tina (voice)

Justin Felbinger as Danny Petrosky (voice)

Nick Fisher as Grateful Boy (voice)

Ariana Greenblatt as Tabitha (voice)

Ben Lepley as Noth Pole (voice)

Hope Levy as Mom (voice)

Max Mittelman as Adult Tim (voice)

Matthew Moy as PoopyDoopy (voice)

Kevin Michael Richardson as Jimbo (voice)

Brandon Scott as Hendershot (voice)

Real Michael Scott as Additional Voices (voice)

Kari Wahlgren as R&D Baby Simmons (voice)

George Lopez as Santa (voice)