Joss Whedon Director, Screenwriter Robert Downey Jr. Tony Stark, Iron Man Actor Chris Hemsworth Thor Actor Mark Ruffalo Bruce Banner, The Hulk Actor Chris Evans Steve Rogers, Captain America Actor Scarlett Johansson Natasha Romanoff, The Black Widow Actor Jeremy Renner Clint Barton, Hawkeye Actor Don Cheadle Lt. Col. James Rhodes Actor Aaron Taylor-Johnson Pietro Maximoff, Quicksilver Actor Elizabeth Olsen Wanda Maximoff, Scarlet Witch Actor Paul Bettany Jarvis, The Vision Actor Cobie Smulders Agent Maria Hill Actor Anthony Mackie Sam Wilson, Falcon Actor Hayley Atwell Peggy Carter Actor Idris Elba Heimdall Actor Stellan Skarsgård Erik Selvig Actor James Spader Ultron Voice Samuel L. Jackson Nick Fury Actor Thomas Kretschmann Strucker Actor Jon Favreau Executive Producer Stan Lee Executive Producer Victoria Alonso Executive Producer Jeremy Latcham Executive Producer Patricia Whitcher Executive Producer Alan Fine Executive Producer Louis D'Esposito Executive Producer Kevin Feige Producer Ben Davis Cinematographer Jeffrey Ford Film Editing Lisa Lassek Film Editing Brian Tyler Original Music Danny Elfman Original Music Charles Wood Production Design Alexandra Byrne Costume Design