 | Keanu Reeves als Klaatu |
 | Jennifer Connelly als Helen Benson |
 | Jaden Smith als Jacob Benson |
 | Jon Hamm als Michael Granier |
 | Kathy Bates als Regina Jackson |
 | John Cleese als Professor Barnhardt |
 | Kyle Chandler als John Driscoll |
 | Robert Knepper als Colonel |
 | Brandon T. Jackson als Target Tech |
 | James Hong als Mr. Wu |
 | Jake McLaughlin als Soldier |
 | John Rothman als Dr. Myron |
 | Sunita Prasad als Rouhani |
 | Juan Riedinger als William Kwan |
 | Sam Gilroy als Tom |
 | Tanya Champoux als Isabel |
 | Rukiya Bernard als Student |
 | Mousa Kraish als Yusef |
 | J.C. MacKenzie als Grossman |
 | Kurt Max Runte als Civil Engineer |
 | Daniel Bacon als Winslow |
 | Reese Alexander als Sergeant |
 | Richard Keats als Helicopter Scientist #1 |
 | Bill Mondy als Helicopter Scientist #2 |
 | Judith Maxie als Helicopter Scientist #3 |
 | Serge Houde als Scientist #1 |
 | Lorena Gale als Scientist #2 |
 | Stefanie Samuels als Guardswoman |
 | Richard Tillman als Army Sergeant |
 | Camille Atebe als NYPD #1 |
 | Thomas Bradshaw als NYPD #2 |
 | Terence Dament als NYPD #3 |
 | Patrick Sabongui als Soldier #1 |
 | Jacob Blair als Soldier #2 |
 | Shaine Jones als Soldier #3 |
 | George Sharperson als Cop |
 | Shaker Paleja als Medic #1 |
 | Doug Chapman als Medic #2 |
 | Marci T. House als Medic #3 |
 | Aaron Craven als Technician |
 | Roger Cross als General Quinn |
 | Heather Doerksen als Regina's Aide |
 | Hiro Kanagawa als Dr. Ikegawa |
 | Craig Stanghetta als Grey Man |
 | Stefan Busse als Grey Man |
 | Dean Redman als Military Policeman |
 | David Richmond-Peck als Polygraph Operator |
 | Andrew Wheeler als Guardsman |
 | Darien Provost als Little Boy |
 | Daniel St. Andrews als Train Passenger #1 |
 | Brad Dryborough als Train Passenger #2 |
 | Ken Kirzinger als Arguing Evacuee |
 | William 'Big Sleeps' Stewart als Transit Cop |
 | Blair Redford als Army Fighter Pilot #1 |
 | Daniel Wisler als Army Fighter Pilot #2 |
 | Mark Kogan als Air Traffic Controller |
 | Ed Fong als Wu's Grandson |
 | Sandy Colton als Army Corps Engineer Captain |
 | Ty Olsson als Flash Chamber Colonel |
 | Jay-Nicolas Hackleman als State Trooper |
 | Dawn Chubai als News Anchor |
 | Joshua Close als Flash Chamber Engineer |
 | Leanne Adachi als Flash Chamber Tech |
 | Geoff Meed als Field Commander Communications Officer |
 | Michael Hogan als General |
 | Ben Cotton als Truck Driver |
 | Kevan Kase als Pickup Truck Driver |
 | Josue Aguirre als Humvee Soldier |
 | Matt Adler als (voice) |
| Coreen Mayrs | Casting |
| David Scarpa | Screenplay |
| Scott Derrickson | Director |
| Tish Monaghan | Costume Design |
| Paul Harris Boardman | Producer |
| Erwin Stoff | Producer |
| Heike Brandstatter | Casting |
| Mindy Marin | Casting |
| Wayne Wahrman | Editor |
| Doug Hardwick | Construction Coordinator |
| David Brisbin | Production Design |
| Sheila Millar | Set Designer |
| Scott Clatney | Scenic Artist |
| Dane A. Davis | Sound Designer |
| Ken Dailey | Visual Effects Producer |
| Dane A. Davis | Supervising Sound Editor |
| Peter Ochotta | Set Designer |
| Steve Maslow | Sound Re-Recording Mixer |
| William Mesa | Visual Effects Supervisor |
| Allan A. Apone | Makeup Department Head |
| Catherine Ircha | Assistant Art Director |
| Erick Geisler | Visual Effects Producer |
| Stephen S. Campanelli | Camera Operator |
| Charles Deenen | Sound Effects Editor |
| Roland N. Thai | Sound Effects Editor |
| Elizabeth Wilcox | Set Decoration |
| Tony Lazarowich | Special Effects Coordinator |
| Thomas F. Ford IV | Visual Effects Producer |
| Les Hunter | Visual Effects Producer |
| David Clarke | Set Designer |
| Chris Del Conte | Visual Effects Producer |
| Emily Wallin | Visual Effects Producer |
| Ken Johns | Camera Operator |
| Darrell Hall | Music Editor |
| Dug Rotstein | Script Supervisor |
| J.J. Makaro | Stunt Coordinator |
| Andrew W. Davidson | Gaffer |
| Ann Goobie | Location Manager |
| Gregg Landaker | Sound Re-Recording Mixer |
| Clare Burgess | Visual Effects Producer |
| Ben Shepherd | Visual Effects Supervisor |
| Brian Machleit | Stunt Coordinator |
| Freida He | Dialect Coach |
| Andrew Li | Assistant Art Director |
| Steve M. Davison | Stunt Coordinator |
| Jake Callihoo | Transportation Coordinator |
| Sam Hutchins | Location Manager |
| David Tattersall | Director of Photography |
| Doane Gregory | Still Photographer |
| Bob Bedard | Chef |
| R. Christopher White | Visual Effects Supervisor |
| Bill R. Dean | Supervising Sound Editor |
| Veronica McAleer | Makeup Artist |
| Jill Bailey | Makeup Artist |
| Bonnie Clevering | Hairstylist |
| Susan Germaine | Hairstylist |
| Francisco X. Pérez | Makeup Artist |
| Joann Fowler | Makeup Artist |
| Jessica Rain | Hairstylist |
| Arun Ram-Mohan | Lighting Artist |
| Matsune Suzuki | Modeling |
| Don MacAulay | Supervising Art Director |
| Gregory Goodman | Producer |
| Brian Avery | Stunts |
| Maja Aro | Stunts |
| Mike Szakmeister | Dialogue Editor |
| Tyler Bates | Original Music Composer |
| Dan Sissons | Property Master |
| Blake R. Cornett | Sound Recordist |
| Fraser Aitcheson | Stunts |
| Noah Beggs | Stunts |
| Jeffrey C. Robinson | Stunt Driver |
| Pete Turner | Stunt Double |
| Larissa Stadnichuk | Stunt Double |
| Chad Bellamy | Stunts |
| Nickolas Baric | Stunts |
| Nick Brandon | Stunts |
| Ieisha Auyeung | Stunts |
| Shawn Beaton | Stunts |
| Guy Bews | Stunts |
| Trevor Addie | Stunts |
| Aaron Au | Stunts |
| Simon Burnett | Stunt Double |
| Jill Bailey | First Assistant Makeup Artist |
| Calla Syna Dreyer | First Assistant Makeup Artist |
| Susan Boyd | Hairstylist |
| Robert Wilson | Hairstylist |
| Ian C. Ballard | Key Hair Stylist |
| Norma Hill-Patton | Key Makeup Artist |
| John L. Healy | Makeup Artist |
| David Hoehn | Prosthetics |
| Todd Masters | Special Effects Makeup Artist |
| Sarah Pickersgill | Special Effects Makeup Artist |
| Nicholas Podbrey | Special Effects Makeup Artist |
| Kyla Rose Tremblay | Special Effects Makeup Artist |
| Chad Washam | Makeup Effects |
| Pete Whyte | First Assistant Director |
| Matthew D. Smith | Second Assistant Director |
| Douglas Dean III | Second Unit First Assistant Director |
| Jeff Habberstad | Second Unit Director |
| David Klohn | Second Assistant Director |
| Chad Belair | Third Assistant Director |
| Rachael Fortier | Third Assistant Director |
| Karin Nosella | Assistant Costume Designer |
| Sandra Watson | Costume Set Supervisor |
| Patrick Gray | Costume Set Supervisor |
| Jennifer Grossman | Costume Supervisor |
| Patrick O'Driscoll | Costumer |
| Alison Fraser | Costumer |
| Nicola Ryall | Key Costumer |
| Susan Davis | Set Costumer |
| Grace Lambert Pyke | Set Costumer |
| Dane Bjerno | Aerial Camera Technician |
| Hans Bjerno | Aerial Director of Photography |
| Phil Pastuhov | Aerial Director of Photography |
| Mariusz Cichon | Assistant Camera |
| Jean-Marc Saldini | Assistant Camera |
| Stephen Thorp | Assistant Chief Lighting Technician |
| Shane Dobie | Best Boy Electric |
| Dan Gorval | Best Boy Grip |
| Benjamin Shurtleff | Camera Loader |
| Marco Ciccone | Camera Operator |
| Bela Trutz | Camera Operator |
| Ashton Harmon | Camera Trainee |
| Boris Martens | Camera Trainee |
| Adam Braverman | Camera Trainee |
| Brent Ballard | First Company Grip |
| Jack Cruikshank | First Company Grip |
| Scott Gray | First Company Grip |
| Peter Grotek | First Company Grip |
| Andrew Coppin | Digital Imaging Technician |
| Ray Wong | Digital Imaging Technician |
| Christos Moisides | Additional Director of Photography |
| Gil Forrester | Dolly Grip |
| Bryce Shaw | Dolly Grip |
| Terry Calhoun | Electrician |
| Christopher Lyons | Electrician |
| Neil Macdonald | Electrician |
| Terry McEwen | First Assistant Camera |
| Sean M. Harding | First Assistant Camera |
| Christopher DelSordo | First Assistant Camera |
| Laurent Soriano | First Assistant Camera |
| Trevor Holbrook | First Assistant Camera |
| Peter Wilke | Camera Operator |
| Dean Heselden | Steadicam Operator |
| Jack English | Gaffer |
| Jay Anderson | Generator Operator |
| Darryl Foulds | Grip |
| Miles Schick | Grip |
| Matthew Devitt | Grip |
| Aaron Knoke | Grip |
| Rick Stribling | Grip |
| Kim Olsen | Key Grip |
| Dean Collins | Key Rigging Grip |
| Simone Perusse | Lighting Programmer |
| Rob Brady | Lighting Technician |
| Justin Hanika | Lighting Technician |
| James S. Harvey | Lighting Technician |
| Jeff Kuzyk | Lighting Technician |
| Jesse Mather | Lighting Technician |
| Christian Schauz | Lighting Technician |
| Frédéric North | Pilot |
| Keith Woods | Rigging Gaffer |
| Oliver Berg | Rigging Grip |
| Rod Haney | Rigging Grip |
| Seth Hettrick | Rigging Grip |
| Tallis Kirby | Rigging Grip |
| Josh Lovig | Rigging Grip |
| Ralph Rutherford | Rigging Grip |
| Jonathan Bosse | Rigging Grip |
| Steve Machan | Rigging Grip |
| Sasha Proctor | Second Assistant "A" Camera |
| Jeff Sayle | Second Assistant "A" Camera |
| Paolo Di Persico | Second Assistant "B" Camera |
| David Lourie | Second Assistant "B" Camera |
| Sarah Mather | Second Assistant "C" Camera |
| Tim Guffin | Second Assistant Camera |
| Tyler Woeste | Second Assistant Camera |
| Tony Mirza | Camera Operator |
| Robert Petrin | Ultimate Arm Operator |
| Pablo Ángeles | 3D Modeller |
| Ryan Hogan | Additional Colorist |
| Gordon Antell | Assistant Editor |
| Melody Gehrman | Assistant Editor |
| Chris Regan | Color Timer |
| Martha Pike | Digital Intermediate Editor |
| Rob Archibald | Editorial Production Assistant |
| Gary Burritt | Negative Cutter |
| Mykel Thuncher | Telecine Colorist |
| Danielle de Smit | Script Supervisor |
| Rob Fournier | Armorer |
| Synderela Peng | Title Designer |
| Garson Yu | Title Designer |
| Michelle Gasque | Art Department Coordinator |
| Ignacio McBurney | Assistant Set Decoration |
| Michael David Bevis | Carpenter |
| Aaron Sims | Character Designer |
| Wayne D. Barlowe | Concept Artist |
| Mauricio Ruiz | Concept Artist |
| Daren Dochterman | Concept Artist |
| Eddie Yang | Conceptual Design |
| John G. Anderson | Construction Buyer |
| Mark Stainthorpe | Construction Foreman |
| Nancy C. Lee | Graphic Designer |
| Anne-Marie Leidl | Graphic Designer |
| Kevin Clark | Greensman |
| Dylan Dowd | Greensman |
| Rick Kramer | Greensman |
| Joel Turner | Greensman |
| Ron Andrews | Lead Painter |
| Jean-Paul Costaz | Paint Coordinator |
| Jack Guppy | Painter |
| Dean Barker | Property Master |
| Kurt Bruun | Props |
| Matthew Wilson | Props |
| Tony Xeros | Props |
| Britt Bancroft | Set Decorating Coordinator |
| J.P. Bagshaw | Set Dresser |
| Dennis Simard | Set Dresser |
| Mecca Thornhill | Set Dresser |
| Salmon Harris | Storyboard Artist |
| Benton Jew | Storyboard Artist |
| Janet Kusnick | Storyboard Artist |
| Mark Moretti | Storyboard Artist |
| Rick Newsome | Storyboard Artist |
| Stephen Platt | Storyboard Artist |
| Mark Vena | Storyboard Artist |
| Tracey Wilson | Storyboard Artist |
| Jonathan Woods | Storyboard Artist |
| Laura Graham | ADR Editor |
| Charleen Richards-Steeves | ADR Mixer |
| David Lucarelli | ADR Recordist |
| Stephanie Flack | ADR Supervisor |
| Drew Yerys | Assistant Sound Editor |
| Michael Hibberson | Boom Operator |
| David Williams | Dialogue Editor |
| Linda Lew | Foley Editor |
| Marla McGuire | Foley Supervisor |
| David Husby | Production Sound Mixer |
| Andy Bishop | Sound Assistant |
| Carmen Lavender | Sound Assistant |
| Frederick Howard | Sound Editor |
| Jussi Tegelman | Sound Editor |
| David A. Whittaker | Sound Editor |
| Scott Aitken | Sound Mixer |
| Kevin Dunigan | Sound Recordist |
| Ahmed Hassan | 3D Artist |
| Dave Kim | 3D Coordinator |
| Karl Rogovin | 3D Coordinator |
| Mike Wallis | Animation Coordinator |
| Ken Stranahan | Animation Supervisor |
| Lori Smallwood | Animation Technical Director |
| Derrick Auyoung | Animation Technical Director |
| Jeremy Hollobon | Animation Technical Director |
| Leonardo Martinez | Animation |
| Don Myers | Animation |
| Todd Labonte | Animation |
| Tim Stevenson | Animation |
| Scott Fritts | Animation |
| Michael Pangrazio | Visual Effects Art Director |
| Artemis Oikonomopoulou | CG Artist |
| Joe Harkins | CG Supervisor |
| Allen Hemberger | CG Supervisor |
| Mike Perry | CG Supervisor |
| Stephane Paris | CG Supervisor |
| Andrew Roberts | CG Supervisor |
| Simon Jung | Compositing Lead |
| David Rey | Compositing Supervisor |
| Wayne A. Shepherd | Compositing Supervisor |
| Erik Bruhwiler | Compositing Supervisor |
| Areito Echevarria | Compositing Supervisor |
| Phillip Leonhardt | Compositing Supervisor |
| Tatjana Bozinovski | Compositor |
| Wing Kwok | Compositor |
| Landon Medeiros | Compositor |
| Daniel Mellitz | Compositor |
| Tim Hey | Compositor |
| Adam Cobabe | Creature Technical Director |
| Gios Johnston | Creature Technical Director |
| Christine Arboit | Creature Technical Director |
| Peter Megow | Creature Technical Director |
| Malcolm Thomas-Gustave | Creature Technical Director |
| Sam Bassett | Digital Compositor |
| Alfred Berger | Digital Compositor |
| David Fogg | Digital Compositor |
| Mark Barber | Digital Compositor |
| Geoff Hadfield | Digital Compositor |
| Michael Lanzensberger | Digital Compositor |
| Ben Morgan | Digital Compositor |
| Helen Paul | Digital Compositor |
| Christoph Salzmann | Digital Compositor |
| Caterina Schiffers | Digital Compositor |
| Hamish Schumacher | Digital Compositor |
| Matt Aitken | Digital Effects Supervisor |
| Paul Story | Lead Animator |
| Shaun Scott | VFX Lighting Artist |
| Matt Conway | Matte Painter |
| Robert Olsson | Matte Painter |
| Sun Lee | Matte Painter |
| Mathieu Raynault | Matte Painter |
| Simon Cheung | Modeling |
| Tamer Eldib | Modeling |
| Chun Seong Ng | Modeling |
| Robert Vignone | Modeling |
| Marc-André Guindon | Pre-Visualization Supervisor |
| Brian Pohl | Pre-Visualization Supervisor |
| George Samilski | Pre-Visualization Supervisor |
| Duane Floch | Pre-Visualization Supervisor |
| Christopher Bennett | Rotoscoping Artist |
| Joshua Gengler | Rotoscoping Artist |
| Kyle Plummer | Rotoscoping Artist |
| Denise Sadighi | Rotoscoping Artist |
| Gee Xiong | Rotoscoping Artist |
| Demitre Garza | Rotoscoping Artist |
| Evan Christie | Rotoscoping Artist |
| David Owen | Rotoscoping Artist |
| Aaron Gilman | Senior Animator |
| Ben Hall | Systems Administrators & Support |
| Andrew Byrne | VFX Artist |
| Anthony Fung | VFX Artist |
| Jeremy Hunt | VFX Artist |
| Jeremy Jozwik | VFX Artist |
| Lars Kramer | VFX Artist |
| John Lindstein | VFX Artist |
| Howard Sly | VFX Artist |
| Enrique Torres | VFX Artist |
| David Hampton | Visual Effects Coordinator |
| Scott Puckett | Visual Effects Coordinator |
| Sharon Stetzel | Visual Effects Coordinator |
| Romulo Adriano Jr. | Visual Effects Coordinator |
| Daniel Chavez | Visual Effects Coordinator |
| Stephen Nixon | Visual Effects Coordinator |
| Andrea Goodson | Visual Effects Coordinator |
| Neil Greenberg | VFX Editor |
| Jon Grinberg | VFX Editor |
| Lincoln Kupchak | VFX Editor |
| Christopher Goble | Visual Effects Production Assistant |
| Sarah Wilson | Visual Effects Production Assistant |
| Molly Pabian | Visual Effects Production Assistant |
| Juliette Davis | Visual Effects Production Manager |
| Jeffrey A. Okun | Visual Effects Supervisor |
| Jamie Dixon | Visual Effects Supervisor |
| Kevin Rafferty | Visual Effects Supervisor |
| Brian DeMetz | Visual Effects Technical Director |
| Maria Giannakouros | Visual Effects Technical Director |
| Dan Novy | Visual Effects Technical Director |
| Don Besse | Special Effects Technician |
| Michael Bolan | Special Effects Technician |
| Bleau Fortier | Special Effects Technician |
| Roy Goode | Special Effects Technician |
| Richard Jacobs | Special Effects Technician |
| Bill Pankiw | Special Effects Technician |
| Mauricio Ruiz | Prosthetics Painter |
| Vance Vegas Salvalaggio | Special Effects Technician |
| Attila Vaski | Special Effects Technician |
| Jim Filippone | Aerial Coordinator |
| Paul Jasper | Aerial Coordinator |
| Kirk Jarrett | Animal Wrangler |
| Jacqueline Dallamore | Assistant Accountant |
| Samantha Quinn | Assistant Accountant |
| Jim Dunlap | First Assistant Accountant |
| Barbara Mercer | First Assistant Accountant |
| Antonia Proscia | First Assistant Accountant |
| Jennifer Klatt | First Assistant Accountant |
| Bill Richards | Pilot |
| Michael Bishop | Key Production Assistant |
| Jill Anderson | Payroll Accountant |
| Andrew Buziak | Payroll Accountant |
| Jason Bogard | Production Accountant |
| Bliss McDonald | Production Coordinator |
| Traceigh Scottel | Production Coordinator |
| Lisa Greenspan | Production Coordinator |
| Adrienne Sol | Production Coordinator |
| David Nico | Production Coordinator |
| Carmen Chan | Production Secretary |
| Meagan Lopez | Casting Assistant |
| Amy Nygaard | Casting Assistant |
| Kara Lipson | Casting Associate |
| Melissa R. Stubbs | Stunts |
| Rick Pearce | Stunts |
| Jeffrey J. Dashnaw | Stunts |
| Buddy Joe Hooker | Stunts |
| Laura Lee Connery | Stunts |
