Keanu Reeves Klaatu
Jennifer Connelly Helen Benson
Jon Hamm Michael Granier
Jaden Smith Jacob Benson
Robert Knepper Colonel
Kathy Bates Regina Jackson
James Hong Mr. Wu
John Cleese Professor Barnhardt
Kyle Chandler John Driscoll
Bill Mondy Helicopter Scientist #2
Richard Keats Helicopter Scientist #1
Ty Olsson Flash Chamber Colonel
Andrew Wheeler Guardsman
Brandon T. Jackson Target Tech
Jake McLaughlin Soldier
Leanne Adachi Flash Chamber Tech
Roger Cross General Quinn
Stefanie Samuels Guardswoman
Patrick Sabongui Soldier #1
Hiro Kanagawa Dr. Ikegawa
Scott Derrickson Director
George Sharperson Cop
Buddy Joe Hooker Stunts
Joann Fowler Makeup Artist
J.C. MacKenzie Grossman
Marci T. House Medic #3
Erick Geisler Visual Effects Producer
Richard Tillman Army Sergeant
John Rothman Dr. Myron
Geoff Meed Field Commander Communications Officer
Jacob Blair Soldier #2
Matthew Wilson Props
Rick Newsome Storyboard Artist
Michael Hogan General
Ben Cotton Truck Driver
Jeff Dashnaw Stunts
Jennifer Grossman Costume Supervisor
Allan A. Apone Makeup Department Head
Joshua Close Flash Chamber Engineer
David Scarpa Screenplay
Heather Doerksen Regina's Aide
Robert Petrin Ultimate Arm Operator
Mark Kogan Air Traffic Controller
Doug Chapman Medic #2
Aaron Craven Technician
Josue Aguirre Humvee Soldier
Ken Kirzinger Arguing Evacuee
Susan Germaine Hairstylist
Laura Lee Connery Stunts
Anne-Marie Leidl Graphic Designer
Melissa R. Stubbs Stunts
David Nico Production Coordinator
George Samilski Pre-Visualization Supervisor
Juan Riedinger William Kwan
Rukiya Bernard Student
Bryce Shaw Dolly Grip
J.J. Makaro Stunt Coordinator
Kurt Max Runte Civil Engineer
Serge Houde Scientist #1
Shaine Jones Soldier #3
Marc-André Guindon Pre-Visualization Supervisor
Dean Redman Military Policeman
Reese Alexander Sergeant
Mousa Kraish Yusef
Dane A. Davis Sound Designer, Supervising Sound Editor
Tyler Bates Original Music Composer
Roy Goode Special Effects Technician
Paul Harris Boardman Producer
Marco Ciccone Camera Operator
Landon Medeiros Compositor
Darien Provost Little Boy
Sunita Prasad Rouhani