Jason Momoa

(Garrett)

Jack Black

(Steve)

Sebastian Eugene Hansen

(Henry)

Emma Myers

(Natalie)

Danielle Brooks

(Dawn)

Jennifer Coolidge

(Vice Principal Marlene)

Rachel House

(Malgosha (voice))

Allan Henry

(Malgosha (Creature Performer))

Bram Scott-Breheny

(Young Steve)

Moana Williams

(Young Garrett)

Jemaine Clement

(Daryl / Bruce (voice))

Mark Wright

(HR Person)

Yvette Parsons

(Delivery Person)

Hiram Garcia

(Mr. Gunchie)

Bret McKenzie

(Nitwit Onset Performer)

Jared Hess

(General Chungus (voice))

Batanai Mashingaidze

(Matty the Waitress)

Amanda Billing

(Henry's Mother)

Tommy Broadmore

(Trevor)

Frankie Creagh-Leslie

(Trevor's Friend)

Alison Quigan

(Chuggy Executive #1)

John Smythe

(Chuggy Executive #2)

Alex Tunui

(Secretary)

Joel Rindelaub

(Arcade Judge)

Rowan Bacal

(Greta)

Matt Berry

(Nitwit (voice))

Alice May Connolly

(Alex Double)

Jens Bergensten

(Waiter)

Oliver Brotherhood

(Auction Attendee)

Daniel Middleton

(Auction Attendee)

Elizabeth Batty

(Auction Attendee)

Jessica Bravura

(Auction Attendee)

Kate McKinnon

(Alex (voice) (uncredited))