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) Whoopi Goldberg Cat (voice) Ian McShane Saiwa (voice)