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

George Sharperson

Cop

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)