Ryan Kelley

as Ben Tennyson

Galadriel Stineman

as Gwen Tennyson

Nathan Keyes

as Kevin E. Levin

Alyssa Diaz

as Elena Validus

Herbert Siguenza

as Victor Validus

Barry Corbin

as Grandpa Max Tennyson

Dee Bradley Baker

as Big Chill / Humongousaur (voice)

Alex Winter

as Nanomech (voice)

Wendy Cutler

as Alien Chip Queen (voice)

Joyce Kurtz

as Computer (voice)

Patrick Cox

as Big Ed

Jeremy DeCarlos

as Helio

Eric Mendenhall

as Fitz

Tony Larkin

as Ship-It Clerk

Aaron Munoz

as Psycho 1

Justin Welborn

as Psycho 2

Michelle Wang

as Molly

Wilbur Fitzgerald

as Financial Guy in Suit

Deborah Duke

as Nurse

Nicole Krausen

as International Plumber 1

Shankar N. Mahadevan

as International Plumber

Brian Beegle

as Genaro

Shaun Bowman

as Zombie

Keylun Johnson

as Herself

Cesar Aguirre

as Mechanic Zombie

Grace Baine

as Alien (uncredited)

Erin Leigh Bushko

as Factory Worker Zombie

Jon Gould

as Stand-In / Factory Worker / Mechanic

Jevocas Green

as Assembly Line Zombie

Ashley Harvin

as Factory Worker Zombie

Shawn Knowles

as Zombie Street Hoodlum

Lynn McArthur

as Waitress Zombie (uncredited)

Katherine Neslund

as Zombie Assembly Line Worker

Bill Pacer

as Factory Worker Zombie (uncredited)

Timothy Douglas Perez

as Forklift Operator (uncredited)

Sean M. Sellers

as Factory Worker Zombie

Sonya Thompson

as Factory Worker Zombie

Steve Warren

as Factory Worker Zombie

Ken R. Wheeler

as Forklift Operator

Erika J. Wood

as Factory Working Zombie / Factory Chasing Zombie

Travis Grant

as Zombie College Student