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)