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 Michael Bruno Security Force #2 Kate Clark Expo Fan Luminita Docan Russian Newscaster François Duhamel French Photographer Larry Ellison Larry Ellison Tim Guinee Major Allen Eric L. Haney General Meade Ali Khan 10 Rings Gangster Evgeniy Lazarev Anton Vanko Stan Lee Larry King Helena Mattsson Rebecca Anya Monzikova Rebeka Keith Middlebrook Expo Cop Margy Moore Bambi Arbogast Olivia Munn Chess Roberts Elon Musk Elon Musk Bill O'Reilly Bill O'Reilly 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 Mark Kubr Prisoner (uncredited) Nicolas Pajon French Reporter (uncredited) Tanoai Reed Security Guard Fighting Happy Hogan (uncredited) Matt McColm Guard (uncredited) Seth Green Expo Fan (uncredited)