Robert Downey Jr. as Tony Stark

Gwyneth Paltrow as Pepper Potts

Don Cheadle as Lt. Col. James 'Rhodey' Rhodes

Scarlett Johansson as Natalie Rushman / Natasha Romanoff

Sam Rockwell as Justin Hammer

Mickey Rourke as Ivan Vanko

Samuel L. Jackson as Nick Fury

Clark Gregg as Agent Coulson

John Slattery as Howard Stark

Garry Shandling as Senator Stern

Paul Bettany as Jarvis (voice)

Kate Mara as U.S. Marshal

Leslie Bibb as Christine Everhart

Jon Favreau as Happy Hogan

Christiane Amanpour as Christiane Amanpour

Philippe Bergeron as Detective Lemieux

James Bethea as Security Force #1

Michael Bruno as Security Force #2

Kate Clark as Expo Fan

Luminita Docan as Russian Newscaster

François Duhamel as French Photographer

Larry Ellison as Larry Ellison

Adam Goldstein as Adam Goldstein

Tim Guinee as Major Allen

Eric L. Haney as General Meade

Ali Khan as 10 Rings Gangster

Evgeniy Lazarev as Anton Vanko

Stan Lee as Stan Lee

Isaiah Guyman Martin IV as AV Operator

Helena Mattsson as Rebecca

Keith Middlebrook as Expo Cop

Anya Monzikova as Rebeka

Margy Moore as Bambi Arbogast

Olivia Munn as Chess Roberts

Elon Musk as Elon Musk

Bill O'Reilly as Bill O'Reilly

Alejandro Patiño as Strawberry Vendor

Davin Ransom as Young Tony Stark

Karim Saleh as Guard

Brian Schaeffer as Hammer Expo Tech

Phillipe Simon as French Waiter

Jack White as Jack

Melanie Brown as Ironette Dancer

Krystal Ellsworth as Ironette Dancer

Victoria Gracie as Ironette Dancer

Gina Cantrell as Ironette Dancer

Renee Herlocker as Ironette Dancer

Jill Ann Pineda-Arnold as Ironette Dancer

Sandy Colton as Ironette Dancer

Annika Ihnat as Ironette Dancer

Jenny Robinson as Ironette Dancer

Lindsay Dennis as Ironette Dancer

Jennifer D. Johnson as Ironette Dancer

Lindsay Rosenberg as Ironette Dancer

Hannah Douglass as Ironette Dancer

Brooke Long as Ironette Dancer

Rachele Brooke Smith as Ironette Dancer

Nadine Ellis as Ironette Dancer

Kylette Zamora as Ironette Dancer

Ayelet Ben-Shahar as Model (uncredited)

John Ceallach as Captain Anders (uncredited)

Katie Cleary as Beautiful Girl (uncredited)

Ajarae Coleman as Expo Guest (uncredited)

Timothy 'TJ' James Driscoll as French Prison Guard #2 (uncredited)

Jasmine Dustin as Watermelon Girl (uncredited)

Sam Felman as Stark Expo Attendee (uncredited)

Shakira Vanise Gamble as Pepper's Party Guest (uncredited)

Paul Grace as French Prison Guard #1 (uncredited)

Mark Kubr as Prisoner (uncredited)

Cameron Lee as Senate Page (uncredited)

Mathew Lorenceau as Prison Guard Chevalier (uncredited)

Christopher Maleki as Reporter (uncredited)

Bryan McCoy as Expo Guest (uncredited)

Tony Nevada as SWAT Sergeant Bellows (uncredited)

Allison Ochmanek as Watermelon Girl (uncredited)

Nicolas Pajon as French Reporter (uncredited)

Steven James Price as Senate Gallery Member (uncredited)

Tanoai Reed as Security Guard Fighting Happy Hogan (uncredited)

Peter Trenholm Smith as Senator (uncredited)

Doug Swander as Party Guest (uncredited)

Peter Sebastian Wrobel as Tony Stark Usher (uncredited)

Nick W. Nicholson as Stark Expo Attendee (uncredited)

Kristin Quick as VIP Expo Guest (uncredited)

Matt McColm as Guard (uncredited)

Seth Green as Expo Fan (uncredited)

Max Favreau as Expo Kid (uncredited)