"Clarence plans to throw the sleepover to end all sleepovers with decorations, pillow fights, and games, but there's one thing missing - guests; Clarence wants invite all his friends, but finds that they might need some convincing."
Spencer Rothbell
as Clarence Wendle / Balance / Camden / Beauford / Mavis (voice)
Tom Kenny
as Ryan 'Sumo' Sumouski / Candice / Walt (voice)
Sean Giambrone
as Jeff Randall / Someone Else (voice)
Katie Crown
as Ms. Baker / Mary / Newscaster / Ms. Shoop / Beach Girl (voice)
Eric Edelstein
as Chad (voice)
Roger Craig Smith
as Belson / Percy / Minni3 / Computer Voice / Beach Guy / Old Lady (voice)
John DiMaggio
as Mel / Zookeeper (voice)
Donovan Patton
as Mr. Reese / Weather Guy / Lisa / Surfer / Hershey (voice)
David Boat
as Mayor (voice)
Christine Lakin
as Tinona / Brandi / Baby (voice)
Ari Rubin
as Tanner (voice)
Kate Berlant
as Ms. Julip (voice)
James Arnold Taylor
as Hershey (voice)
Lea DeLaria
as EJ (voice)
Peter Browngardt
as Ham the Power Guy / Someone (voice)
Vitaliy Strokous
Director
Niki Yang
Tony Infante
Writer
Kelsy Abbott
Sam Kremers-Nedell