Jason Nesmith/Commanter Peter Quincy Taggart
Tim Allen
Gwen DeMarco/Lieutenant Tawny Madison
Sigourney Weaver
Sir Alexander Dane/Dr. Lazarus
Alan Rickman
Fred Kwan/Tech Sergeant Chen
Tony Shalhoub
Guy Fleegman/Security Chief 'Roc' Ingersol
Sam Rockwell
Tommy Webber/Lieutenant Laredo
Daryl Mitchell
Mathesar
Enrico Colantoni
Sarris
Robin Sachs
Quellek
Patrick Breen
Laliari/Jane Doe
Missi Pyle
Teb
Jed Rees
Brandon
Justin Long
Kyle
Jeremy Howard
Katelyn
Kaitlin Cullum
Hollister
Jonathan Feyer
Tommy Webber/Laredo (age 9)
Corbin Bleu
Neru
Sam Lloyd
Lahnk
Rainn Wilson
Excited Alien
J.P. Manoux
Lieutenant Lathe
Wayne Pere
Nervous Tech
Dian Bachar
Brandon's Mom
Heidi Swedberg
Fan No. 1
Bill Chott
Announcer (as Kevin Hamilton McDonald)
Kevin McDonald
Fan
Morgan Rusler
Fan No. 3
Gregg Binkley
Fan No. 4
Brandon Michael DePaul
Fan
Paul G. Kubiak
Sarris' Guard
Isaac C. Singleton Jr.
Fan
Greg Colbrook
Warrior Alien
Joel McKinnon Miller
Shy Girl
Jennifer Manley
Teen in the Bathroom No. 1
John Patrick White
Teen in the Bathroom No. 2
Todd Giebenhain
Reporter
Jerry Penacoli
Navigator
Dan Gunther
Technician No. 1
Matt Winston
Technician No. 2
Brandon Keener
Teek
Susan Egan
Sarris' Guard
Issac C. Singleton Jr.
Alien Fan
Daniel T. Parker
Inventory Clerk
Dawn Hutchins
Thermian Greeter No. 1
Lawrence Richards
Thermian Greeter No. 2
Mic Tomasi
Fan #4/Fan #4
Brandon de Paul