 | Robert Downey Jr. als Tony Stark / Iron Man |
 | Mickey Rourke als Ivan Vanko / Whiplash |
 | Don Cheadle als James 'Rhodey' Rhodes / War Machine |
 | Gwyneth Paltrow als Virginia 'Pepper' Potts |
 | Sam Rockwell als Justin Hammer |
 | Scarlett Johansson als Natalie Rushman / Natasha Romanoff / Black Widow |
 | Samuel L. Jackson als Nick Fury |
 | Jon Favreau als Harold 'Happy' Hogan |
 | Garry Shandling als Senator Stern |
 | John Slattery als Howard Stark |
 | Paul Bettany als J.A.R.V.I.S. (voice) |
 | Clark Gregg als Phil Coulson |
 | Leslie Bibb als Reporter Christine Everhart |
 | Evgeniy Lazarev als Anton Vanko |
 | Kate Mara als U.S. Marshal |
 | Christiane Amanpour als Christiane Amanpour |
 | Philippe Bergeron als Detective Lemieux |
| James Bethea als Security Force #1 |
 | Michael Bruno als Security Force #2 |
 | Kate Clark als Expo Fan |
 | Luminita Docan als Russian Newscaster |
 | François Duhamel als French Photographer |
 | Larry Ellison als Larry Ellison |
| Adam Goldstein als Adam Goldstein |
 | Tim Guinee als Major Allen |
 | Eric L. Haney als General Meade |
 | Ali Khan als 10 Rings Gangster |
 | Stan Lee als Larry King |
| Isaiah Guyman Martin IV als AV Operator |
 | Helena Mattsson als Rebecca |
 | Anya Monzikova als Rebeka |
 | Keith Middlebrook als Expo Cop |
 | Margy Moore als Bambi Arbogast |
 | Olivia Munn als Chess Roberts |
 | Elon Musk als Elon Musk |
 | Bill O'Reilly als Bill O'Reilly |
 | Alejandro Patiño als Strawberry Vendor |
 | Davin Ransom als Young Tony Stark |
 | Karim Saleh als Guard |
 | Brian Schaeffer als Hammer Expo Tech |
 | Phillipe Simon als French Waiter |
 | Jack White als Jack |
 | Jenny Robinson als Ironette Dancer |
 | Melanie Brown als Ironette Dancer |
 | Krystal Ellsworth als Ironette Dancer |
 | Victoria Gracie als Ironette Dancer |
 | Gina Cantrell als Ironette Dancer |
 | Renee Herlocker als Ironette Dancer |
 | Jill Ann Pineda-Arnold als Ironette Dancer |
 | Sandy Colton als Ironette Dancer |
 | Annika Ihnat als Ironette Dancer |
 | Lindsay Dennis als Ironette Dancer |
 | Jennifer D. Johnson als Ironette Dancer |
 | Lindsay Rosenberg als Ironette Dancer |
 | Hannah Douglass als Ironette Dancer |
 | Brooke Long als Ironette Dancer |
 | Rachele Brooke Smith als Ironette Dancer |
| Kylette Zamora als Ironette Dancer |
 | Nadine Ellis als Ironette Dancer |
| Ayelet Ben-Shahar als Model (uncredited) |
 | John Ceallach als Captain Anders (uncredited) |
 | Katie Cleary als Beautiful Girl (uncredited) |
| Ajarae Coleman als Expo Guest (uncredited) |
| Timothy 'TJ' James Driscoll als French Prison Guard #2 (uncredited) |
| Jasmine Dustin als Watermelon Girl (uncredited) |
| Sam Felman als Stark Expo Attendee (uncredited) |
| Shakira Vanise Gamble als Pepper's Party Guest (uncredited) |
 | Paul Grace als French Prison Guard #1 (uncredited) |
 | Mark Kubr als Prisoner (uncredited) |
 | Cameron Lee als Senate Page (uncredited) |
 | Jee-Yun Lee als Reporter (archive footage) (uncredited) |
| Mathew Lorenceau als Prison Guard Chevalier (uncredited) |
 | Christopher Maleki als Reporter (uncredited) |
| Bryan McCoy als Expo Guest (uncredited) |
 | Tony Nevada als SWAT Sergeant Bellows (uncredited) |
| Allison Ochmanek als Watermelon Girl (uncredited) |
 | Nicolas Pajon als French Reporter (uncredited) |
| Steven James Price als Senate Gallery Member (uncredited) |
 | Tanoai Reed als Security Guard Fighting Happy Hogan (uncredited) |
| Peter Trenholm Smith als Senator (uncredited) |
| Doug Swander als Party Guest (uncredited) |
| Peter Sebastian Wrobel als Tony Stark Usher (uncredited) |
| Nick W. Nicholson als Stark Expo Attendee (uncredited) |
| Kristin Quick als VIP Expo Guest |
 | Matt McColm als Guard (uncredited) |
 | Seth Green als Expo Fan (uncredited) |
| Denis L. Stewart | Executive Producer |
| Kevin Feige | Producer |
| Matthew Libatique | Director of Photography |
| David Maisel | Executive Producer |
| Lauri Gaffin | Set Decoration |
| Heidi Brook Myers | ADR & Dubbing |
| Stan Lee | Executive Producer |
| Mary Zophres | Costume Design |
| David F. Klassen | Art Direction |
| Justin Theroux | Screenplay |
| Richard Pearson | Editor |
| Sarah Halley Finn | Casting |
| Louis D'Esposito | Executive Producer |
| Jon Favreau | Executive Producer |
| Randi Hiller | Casting |
| Alan Fine | Executive Producer |
| Dan Lebental | Editor |
| Jon Favreau | Director |
| Suzan Wexler | Art Direction |
| Susan Downey | Executive Producer |
| Page Buckner | Art Direction |
| Michael E. Goldman | Art Direction |
| J. Michael Riva | Production Design |
| Travis Tohill | Animation |
| Kevin Kaska | Orchestrator |
| Jessie Graff | Stunts |
| Riley Harper | Stunts |
| Michael Hansen | Utility Stunts |
| Daniel Sudick | Special Effects Coordinator |
| Janek Sirrs | Visual Effects Supervisor |
| Ged Wright | Visual Effects Supervisor |
| Ben Snow | Visual Effects Supervisor |
| Ben O'Brien | Digital Compositor |
| John Walker | VFX Artist |
| Mickael Coedel | Animation |
| Cheyenne Ellis | Utility Stunts |
| Trinh Tran | Production Assistant |
| Russell Bobbitt | Property Master |
| Tanner Foust | Stunt Driver |
| Christopher Boyes | Sound Re-Recording Mixer |
| Christopher Boyes | Sound Designer |
| Dave Jordan | Music Supervisor |
| Victoria Alonso | Co-Producer |
| Jeremy Latcham | Co-Producer |
| Karen Gilchrist | Associate Producer |
| Eric Heffron | Associate Producer |
| Basil Grillo | Unit Production Manager |
| Denis L. Stewart | Unit Production Manager |
| Eric Heffron | First Assistant Director |
| Chris Castaldi | Second Assistant Director |
| Susan Pickett | Visual Effects Producer |
| Jonathan Taylor | Second Unit Director |
| Marc Chu | Animation Supervisor |
| Wayne Billheimer | Visual Effects Producer |
| Shane Mahan | Effects Supervisor |
| Julie Socash | Key Makeup Artist |
| Michael Bauman | Gaffer |
| John Debney | Original Music Composer |
| Stan Lee | Comic Book |
| Don Heck | Comic Book |
| Larry Lieber | Comic Book |
| Jack Kirby | Comic Book |
| Donna Evans | Stunt Double |
| Heidi Moneymaker | Stunt Double |
| Chad Stahelski | Utility Stunts |
| Tracy Keehn-Dashnaw | Utility Stunts |
| Jeff Imada | Fight Choreographer |
| Annie Ellis | Utility Stunts |
| Jon H. Epstein | Utility Stunts |
| Diana R. Lupo | Utility Stunts |
| Troy Robinson | Utility Stunts |
| Cassidy Vick Hice | Utility Stunts |
| Chris Palermo | Utility Stunts |
| Eileen Weisinger | Utility Stunts |
| Jeffrey J. Dashnaw | Stunts |
| Oakley Lehman | Stunt Double |
| Hank Amos | Stunts |
| Heather Arthur | Utility Stunts |
| Kenny Alexander | Utility Stunts |
| David Anthony Buglione | Stunts |
| Joe Bucaro III | Stunts |
| Richard Cetrone | Utility Stunts |
| Troy Brown | Utility Stunts |
| David Castillo | Utility Stunts |
| Eugene Collier | Utility Stunts |
| Eric Chambers | Utility Stunts |
| Mark Chapman | Utility Stunts |
| Paul Crawford | Stunts |
| Clay Cullen | Stunts |
| Esteban Cueto | Stunts |
| Tim A. Davison | Utility Stunts |
| Keith Splinter Davis | Utility Stunts |
| Kiante Elam | Stunt Double |
| Brian Duffy | Utility Stunts |
| Jean-François Dubut | Stunt Driver |
| Jeremy Fitzgerald | Utility Stunts |
| Clay Donahue Fontenot | Stunt Double |
| Jonathan Eusebio | Fight Choreographer |
| Mike Gunther | Utility Stunts |
| Glenn Foster | Stunt Double |
| Thomas Robinson Harper | Stunt Coordinator |
| John Hateley | Stunts |
| Logan Holladay | Stunts |
| Shawn Kautz | Utility Stunts |
| Chuck 'Chaz' Hosack | Utility Stunts |
| Mark Kubr | Utility Stunts |
| Thomas J. Lawson | Utility Stunts |
| Baz Karbouris | Utility Stunts |
| Matt Leonard | Utility Stunts |
| Oakley Lehman | Utility Stunts |
| Malosi Leonard | Utility Stunts |
| Matt McColm | Utility Stunts |
| Kevin LaRosa Jr. | Utility Stunts |
| Bobby McLaughlin | Utility Stunts |
| Mike Mukatis | Utility Stunts |
| Tanoai Reed | Stunts |
| Rex Reddick | Stunts |
| Mic Rodgers | Utility Stunts |
| R.A. Rondell | Utility Stunts |
| James Ryan | Utility Stunts |
| Rich Rutherford | Utility Stunts |
| Michael Runyard | Utility Stunts |
| Ray Siegle | Utility Stunts |
| David Schultz | Utility Stunts |
| Cain Smead | Utility Stunts |
| Tim Trella | Utility Stunts |
| Vladimir Tevlovski | Utility Stunts |
| Steve Upton | Stunts |
| Scott Workman | Utility Stunts |
| Keith Woulard | Stunt Coordinator |
| Danny Wynands | Utility Stunts |
| Nico Woulard | Stunts |
| Katie Eischen | Utility Stunts |
| Simone Bargetze | Stunts |
| Krista Bell | Stunts |
| Jakob Bokulich | Stunts |
| Sara Holden | Stunts |
| Marc C. Geschwind | Stunt Driver |
| Greg Fitzpatrick | Stunt Double |
| Bridgett Riley | Stunts |
| Chrissy Weathersby Ball | Stunts |
| Richard C. Taylor | Utility Stunts |
| Justin A. Williams | Stunts |
| Alvin Zalamea | Stunts |
| Boni Yanagisawa | Utility Stunts |
| Garrett Warren | Stunt Double |
| Hiroshi Mori | Visual Effects |
| Casey O'Neill | Utility Stunts |
