Keanu Reeves
Klaatu
Jennifer Connelly
Helen Benson
Jaden Smith
Jacob Benson
Jon Hamm
Michael Granier
Kathy Bates
Regina Jackson
John Cleese
Professor Barnhardt
Kyle Chandler
John Driscoll
Robert Knepper
Colonel
Brandon T. Jackson
Target Tech
James Hong
Mr. Wu
Jake McLaughlin
Soldier
John Rothman
Dr. Myron
Sunita Prasad
Rouhani
Juan Riedinger
William Kwan
Sam Gilroy
Tom
Tanya Champoux
Isabel
Rukiya Bernard
Student
Mousa Kraish
Yusef
J.C. MacKenzie
Grossman
Kurt Max Runte
Civil Engineer
Daniel Bacon
Winslow
Reese Alexander
Sergeant
Richard Keats
Helicopter Scientist #1
Bill Mondy
Helicopter Scientist #2
Judith Maxie
Helicopter Scientist #3
Serge Houde
Scientist #1
Lorena Gale
Scientist #2
Stefanie Samuels
Guardswoman
Richard Tillman
Army Sergeant
Camille Atebe
NYPD #1
Thomas Bradshaw
NYPD #2
Terence Dament
NYPD #3
Patrick Sabongui
Soldier #1
Jacob Blair
Soldier #2
Shaine Jones
Soldier #3
Shaker Paleja
Medic #1
Doug Chapman
Medic #2
Marci T. House
Medic #3
Aaron Craven
Technician
Roger Cross
General Quinn
Heather Doerksen
Regina's Aide
Hiro Kanagawa
Dr. Ikegawa
Craig Stanghetta
Grey Man
Stefan Busse
Grey Man
Dean Redman
Military Policeman
David Richmond-Peck
Polygraph Operator
Andrew Wheeler
Guardsman
Darien Provost
Little Boy
Daniel St. Andrews
Train Passenger #1
Brad Dryborough
Train Passenger #2
Ken Kirzinger
Arguing Evacuee
William 'Big Sleeps' Stewart
Transit Cop
Blair Redford
Army Fighter Pilot #1
Daniel Wisler
Army Fighter Pilot #2
Mark Kogan
Air Traffic Controller
Ed Fong
Wu's Grandson
Sandy Colton
Army Corps Engineer Captain
Ty Olsson
Flash Chamber Colonel
Jay-Nicolas Hackleman
State Trooper
Dawn Chubai
News Anchor
Joshua Close
Flash Chamber Engineer
Leanne Adachi
Flash Chamber Tech
Geoff Meed
Field Commander Communications Officer
Michael Hogan
General
Ben Cotton
Truck Driver
Kevan Kase
Pickup Truck Driver
Josue Aguirre
Humvee Soldier
Matt Adler
(voice)