Ashley Johnson
Tulip Olsen (voice)
Jeremy Crutchley
Glad-One (voice)
Kirby Howell-Baptiste
Grace (voice)
Kyle McCarley
Simon (voice)
Robbie Daymond
Jesse (voice)
Isabella Abiera
Hazel (voice)
Johnny Young
Min-Gi (voice)
Kate Mulgrew
The Cat (voice)
Ernie Hudson
Atticus (voice)
Ben Mendelsohn
Agent Mace (voice)
Bradley Whitford
Agent Sieve (voice)
Rhys Darby
Randall / Balloon Randall (voice)
Keith Ferguson
Goblin / Tusk Creature / Announcer Tannuki (voice)
Justin Michael
Friend (voice)
Audrey Wasilewski
Megan Olsen (voice)
Dee Bradley Baker
Monster Atticus (voice)
Justin Felbinger
Nate (voice)
Reagan Gomez-Preston
Mikayla / Dolphin Handler / Ugly Irwin (voice)
Matthew Rhys
Aloysius (voice)
Mark Fite
Andy Olsen / Harry The Bike Guy (voice)
Lena Headey
The Conductor / Amelia (voice)
Jenna Davis
Lucy / Kevin Jr. / Lindsay (voice)
Grey DeLisle
Lunch Lady / Tape Merchant / Seedy Merchant (voice)
Laraine Newman
Marietta Gillicutty / Maise Trundleshank (voice)
Kari Wahlgren
Sinesta Gillicutty / Bree Trundleshank / Girl Quadruplets (voice)
Rick Zieff
Ithmush Trundleshank / Nathaniel Trundleshank / Silas Trundleshank (voice)
Wayne Knight
Marcel (voice)
Scott Menville
Troy / Bully 1 (voice)
Bill Corbett
Perry the Parasite (voice)
BeBe Zahara Benet
Sashay (voice)
Naomi Hansen
5 Year Old Tulip (voice)
Lily Sanfelippo
6 Year Old Tulip / 8 Year Old Tulip (voice)
Ron Funches
Khaki Bottoms (voice)
Antonio Raul Garcia
Apex Child / Apex Child 2 (voice)
Alfred Molina
Chandelier (voice)
Jacob Farry
Apex Kid 2 (voice)
