Robert Downey Jr. as Tony Stark / Iron Man

Chris Evans as Steve Rogers / Captain America

Mark Ruffalo as Bruce Banner / The Hulk

Chris Hemsworth as Thor

Scarlett Johansson as Natasha Romanoff / Black Widow

Jeremy Renner as Clint Barton / Hawkeye

Tom Hiddleston as Loki

Clark Gregg as Agent Phil Coulson

Cobie Smulders as Agent Maria Hill

Stellan Skarsgård as Selvig

Samuel L. Jackson as Nick Fury

Gwyneth Paltrow as Pepper Potts

Paul Bettany as Jarvis (voice)

Alexis Denisof as The Other

Tina Benko as NASA Scientist

Jerzy Skolimowski as Georgi Luchkov

Kirill Nikiforov as Weaselly Thug

Jeff Wolfe as Tall Thug

M'laah Kaur Singh as Young Girl

Rashmi Rustagi as Calcutta Woman

Powers Boothe as World Security Council

Jenny Agutter as World Security Council

Arthur Darbinyan as World Security Council

Donald Li as World Security Council

Warren Kole as Carrier Bridge Tech

Alicia Sixtos as Carrier Bridge Tech

Jesse Garcia as Carrier Bridge Techs

Maximiliano Hernández as Agent Jasper Sitwell

Dieter Riesle as Gala Scientist

Kenneth Tigar as German Old Man

Walter Perez as Young Shield Pilot

Harry Dean Stanton as Security Guard

Josh Cowdery as Maintenance Guy

Ashley Johnson as Waitress

Katsumi Komatsu as Japanese Family

Yumiko Komatsu as Japanese Family

Momoko Komatsu as Japanese Family

Robert Clohessy as Police Sergeant

Enver Gjokaj as Young Cop

Fernanda Toker as Office Woman

Andrea Vecchio as News Reporter

Robin Swoboda as News Reporter

Brent McGee as Faceless Pilot

Jamie McShane as Celebration Montage Interviewee

Michael Zhang as Celebration Montage Interviewee

William-Christopher Stephens as Celebration Montage Interviewee

Kelley Robins Hicks as Celebration Montage Interviewee

Romy Rosemont as Shawna Lynde

James Eckhouse as Senator Boynton

Stan Lee as Stan Lee

Thomas Roberts as Thomas Roberts

Pat Kiernan as Pat Kiernan

Damion Poitier as Man #1

Lou Ferrigno as The Hulk (voice) (uncredited)

Jillian Morgese as Woman in Restaurant (uncredited)

Catherine Anderson as German Pedestrian (uncredited)

Ricardo Andres as Lentil Merchant (uncredited)

Logan Bennett as Shield Agent (uncredited)

Mayank Bhatter as Celebration Montage Man Shaving Beard (uncredited)

Sharita Bone as Gala Guest (uncredited)

Jason Botsford as Museum Gala Patron (uncredited)

Mary Kate Campbell as Stuttgart Biergarten patron (uncredited)

Gene N. Chavez as Shield Guard (uncredited)

Layla Cushman as Gala Guest (uncredited)

Robert Dean as Soldier (uncredited)

Rick Dremann as Museum Gala Guest (uncredited)

Rod Fielder as Pedestrian (uncredited)

Eric Frank as Stuttgart Citizen (uncredited)

Israel Hall as Shield Agent (uncredited)

Carmen Dee Harris as Museum Gala Patron (uncredited)

Alexander Christopher Jones as Mercenary (uncredited)

Mike Karban as Pedestrian (uncredited)

Demoine Kinney as Shield Agent (uncredited)

Andrew Knode as Stuttgart Citizen (uncredited)

Annette Lawless as Hostage (uncredited)

Kimberly J. Mahoney as Limo Driver (uncredited)

Todd Manes as Helicarrier Medical Team Leader (uncredited)

Jorge Mardel as Stuttgart Driver (uncredited)

Michael McMillan as Cafe Patron (uncredited)

Sean Meehan as Guard (uncredited)

Holly Neelie as Gala Museum Patron (uncredited)

Caleb Daniel Noal as Extra (uncredited)

Jeremy Orr as Shield Agent (uncredited)

Nate Paige as New York Pedestrian (uncredited)

Martin Palmer as Shiel Employee (uncredited)

Maria Perossa as Museum Gala Guest (uncredited)

Caleb Pieplow as Extra (uncredited)

Alexander Daniel Pimentel as Helicarrier Shield Agent (uncredited)

Frank Powers as Shield Agent - Loki Escort (uncredited)

Jaime Powers as Shield Agent (uncredited)

Brent Reichert as Stuttgart Gala Patron (uncredited)

Kelly Ruble as Shield Agent (uncredited)

Gina Sarno as Restaurant Patron (uncredited)

Robert B. Schneider IV as New York City Police Officer (uncredited)

Jeff Seich as New York Police Officer in Firefight (uncredited)

Christina Shaffer as Stuttgart Beer Garden Patron (uncredited)

Douglas Slygh as Museum Gala Patron (uncredited)

Colin Strause as Shield Agent #4 (uncredited)

Robert P. Thitoff as Gala Patron (uncredited)

George Thomas as S.H.I.E.L.D. Agent (uncredited)

Shane Thompson as Pedestrian (uncredited)

Jerry Lee Tucker as Mercenary (uncredited)

Tai Urban as Child on News #1 (uncredited)

Chris Vaina as Running Pedestrian (uncredited)

Sandra Weston as Sweeper (uncredited)

Seth Zielicke as Barbershop (uncredited)

Alex DeCourville as Tourist (uncredited)

Andrea-Nichole Olivas as Shield Agent (uncredited)

Tina Grimm as NYC Pedestrian (uncredited)

Evan Kole as Principal (uncredited)

Hank Amos as Shield Agent (uncredited)

Joti Nagra as Waitress (uncredited)