Robert Downey Jr.
- Tony Stark / Iron Man |
Gwyneth Paltrow
- Virginia "Pepper" Potts |
Don Cheadle
- James "Rhodey" Rhodes / War Machine |
Scarlett Johansson
- Natalie Rushman / Natasha Romanoff / Black Widow |
Sam Rockwell
- Justin Hammer |
Mickey Rourke
- Ivan Vanko / Whiplash |
Samuel L. Jackson
- Nick Fury |
Clark Gregg
- Phil Coulson |
John Slattery
- Howard Stark |
Garry Shandling
- Senator Stern |
Paul Bettany
- J.A.R.V.I.S. (voice) |
Leslie Bibb
- Christine Everhart |
Kate Mara
- U.S. Marshal |
Jon Favreau
- Harold "Happy" Hogan |
Christiane Amanpour
- Christiane Amanpour |
Philippe Bergeron
- Detective Lemieux |
James Bethea
- Security Force #1 |
Michael Bruno
- Security Force #2 |
Kate Clark
- Expo Fan |
Luminita Docan
- Russian Newscaster |
François Duhamel
- French Photographer |
Larry Ellison
- Himself |
Adam Goldstein
- Himself |
Tim Guinee
- Major Allen |
Eric L. Haney
- General Meade |
Ali Khan
- 10 Rings Gangster |
Evgeniy Lazarev
- Anton Vanko |
Stan Lee
- Himself |
Isaiah Guyman Martin IV
- AV Operator |
Helena Mattsson
- Rebecca |
Anya Monzikova
- Rebeka |
Keith Middlebrook
- Expo Cop |
Margy Moore
- Bambi Arbogast |
Olivia Munn
- Chess Roberts |
Elon Musk
- Himself |
Bill O'Reilly
- Himself |
Alejandro Patiño
- Strawberry Vendor |
Davin Ransom
- Young Tony Stark |
Karim Saleh
- Guard |
Brian Schaeffer
- Hammer Expo Tech |
Phillipe Simon
- French Waiter |
Jack White
- Jack |
Jenny Robinson
- Ironette Dancer |
Melanie Brown
- Ironette Dancer |
Krystal Ellsworth
- Ironette Dancer |
Victoria Gracie
- Ironette Dancer |
Gina Cantrell
- Ironette Dancer |
Renee Herlocker
- Ironette Dancer |
Jill Ann Pineda-Arnold
- Ironette Dancer |
Sandy Colton
- Ironette Dancer |
Annika Ihnat
- Ironette Dancer |
Lindsay Dennis
- Ironette Dancer |
Jennifer D. Johnson
- Ironette Dancer |
Lindsay Rosenberg
- Ironette Dancer |
Hannah Douglass
- Ironette Dancer |
Brooke Long
- Ironette Dancer |
Rachele Brooke Smith
- Ironette Dancer |
Kylette Zamora
- Ironette Dancer |
Nadine Ellis
- Ironette Dancer |
Ayelet Ben-Shahar
- Model (uncredited) |
John Ceallach
- Captain Anders (uncredited) |
Katie Cleary
- Beautiful Girl (uncredited) |
Ajarae Coleman
- Expo Guest (uncredited) |
Rick L. Dean
- Monte Carlo Race Fan (uncredited) |
Timothy 'TJ' James Driscoll
- French Prison Guard #2 (uncredited) |
Jasmine Dustin
- Watermelon Girl (uncredited) |
Sam Felman
- Stark Expo Attendee (uncredited) |
Shakira Vanise Gamble
- Pepper's Party Guest (uncredited) |
Paul Grace
- French Prison Guard #1 (uncredited) |
Mark Kubr
- Prisoner (uncredited) |
Cameron Lee
- Senate Page (uncredited) |
Jee-Yun Lee
- Reporter (archive footage) (uncredited) |
Waymond Lee
- Expo Guest (uncredited) |
Mathew Lorenceau
- Prison Guard Chevalier (uncredited) |
Christopher Maleki
- Reporter (uncredited) |
Bryan McCoy
- Expo Guest (uncredited) |
Ed Moy
- Awards Attendee (uncredited) |
Tony Nevada
- SWAT Sergeant Bellows (uncredited) |
Allison Ochmanek
- Watermelon Girl (uncredited) |
Nicolas Pajon
- French Reporter (uncredited) |
Steven James Price
- Senate Gallery Member (uncredited) |
Tanoai Reed
- Security Guard Fighting Happy Hogan (uncredited) |
Peter Trenholm Smith
- Senator (uncredited) |
Doug Swander
- Party Guest (uncredited) |
Peter Sebastian Wrobel
- Tony Stark Usher (uncredited) |
Nick W. Nicholson
- Stark Expo Attendee (uncredited) |
Kristin Quick
- VIP Expo Guest |
Matt McColm
- Guard (uncredited) |