Keanu Reeves Klaatu
Jennifer Connelly Helen Benson
Jon Hamm Michael Granier
John Cleese Professor Barnhardt
Jaden Smith Jacob Benson
Kathy Bates Regina Jackson
Aaron Sims Character Designer
Robert Knepper Colonel
Ken Kirzinger Arguing Evacuee
Serge Houde Scientist #1
Rukiya Bernard Student
William Mesa Visual Effects Supervisor
Frederick Howard Sound Editor
Kyle Chandler John Driscoll
Lorena Gale Scientist #2
Scott Derrickson Director
Noah Beggs Stunts
Matthew D. Smith Second Assistant Director
Peter Ochotta Set Designer
Doane Gregory Still Photographer
Brian Avery Stunts
Emily Wallin Visual Effects Producer
Hugo Steele Stunts
Geoff Meed Field Commander Communications Officer
Sun Lee Matte Painter
Kurt Max Runte Civil Engineer
Matt Adler (voice)
Marci T. House Medic #3
Jussi Tegelman Sound Editor
Duane Floch Pre-Visualization Supervisor
Bill Mondy Helicopter Scientist #2
Richard Keats Helicopter Scientist #1
Nicola Ryall Key Costumer
Scott Fritts Animation
Ty Olsson Flash Chamber Colonel
Nick Brandon Stunts
Darien Provost Little Boy
Sunita Prasad Rouhani
Aaron Craven Technician
Dawn Chubai News Anchor
Tanya Champoux Isabel
Aaron Gilman Senior Animator
Lincoln Kupchak VFX Editor
Roger Cross General Quinn
Jeffrey A. Okun Visual Effects Supervisor
Judith Maxie Helicopter Scientist #3
Jim Filippone Aerial Coordinator
Ben Cotton Truck Driver
Leanne Adachi Flash Chamber Tech
James Hong Mr. Wu
Stefanie Samuels Guardswoman
Tony Lazarowich Special Effects Coordinator
Dane A. Davis Sound Designer, Supervising Sound Editor
Elizabeth Wilcox Set Decoration
John G. Anderson Construction Buyer
Jim Dunlap First Assistant Accountant
David Brisbin Production Design
William 'Big Sleeps' Stewart Transit Cop
Doug Hardwick Construction Coordinator
Ian C. Ballard Key Hair Stylist
Michael Hogan General
Patrick Sabongui Soldier #1
Brandon T. Jackson Target Tech
Mark Moretti Storyboard Artist
Stephen S. Campanelli Camera Operator
Norma Hill-Patton Key Makeup Artist
Jacob Blair Soldier #2
Brad Dryborough Train Passenger #2
Paul Harris Boardman Producer
John Rothman Dr. Myron
Hiro Kanagawa Dr. Ikegawa
Jake McLaughlin Soldier