Jacob Tremblay
Elmer Elevator (voice)
Gaten Matarazzo
Boris the Dragon (voice)
Golshifteh Farahani
Dela Elevator (voice)
Dianne Wiest
Iris the Rhinoceros (voice)
Rita Moreno
Mrs. McClaren (voice)
Chris O'Dowd
Kwan the Macaque (voice)
Judy Greer
Soda the Whale (voice)
Alan Cumming
Cornelius the Crocodile (voice)
Yara Shahidi
Callie (voice)
Jackie Earle Haley
Tamir the Tarsier (voice)
Mary Kay Place
Narrator (voice)
Leighton Meester
Sasha (voice)
Spence Moore II
George (voice)
Adam Brody
Bob (voice)
Charlyne Yi
Magda (voice)
Jack S. A. Smith
Eugene (voice)
Maggie Lincoln
Gertie (voice)
Whoopi Goldberg
Cat (voice)
Ian McShane
Saiwa (voice)