Danny DeVito as Cathkart

Brie Larson as Suzy Decker

Katey Sagal as Mom

Skyler Stone as Quinn

Caitlin Crosby as Sarah

Ryan Hansen as Elliot Cathkart

Thomas F. Wilson as Fire Chief Henry Decker

Tony Yalda as Gilroy

Matthew Glave as Hector

Kiernan Shipka as Daughter Camper

Adam Herschman as Shirtless Boy

Parvesh Cheena as Zerban

Michael Bofshever as Husband Camper

Corryn Cummins as Wife Camper

Nick Nervies as Brando

Quan Rico as Buster

John Farley as Nate the Store Manager

Jessica Harper as DWP Clerk

Gregory Hinton as Carl the Enormous Tranny

John S. McClellan as Pierced Man w / Puppet

Christine Nguyen as Brunette Hottie

Tabitha Taylor as Blondie Hottie

Shannon Holt as Parent

Raphael Lachs as Delivery Man

Drew Matthews as Apartment Kid

Ashlee Abrams as Cheerleader

Vanessa Celso as Angry Woman

Stephanie Katz as Cheerleader

Joe Koons as Trail

Ashley Rose as Cheerleader

Jessica Harper as DWP Clerk