Anthony Russo Director Joe Russo Director Robert Downey Jr. Tony Stark, Iron Man Actor Chris Hemsworth Thor Actor Josh Brolin Thanos Actor Chadwick Boseman T'Challa, Black Panther Actor Mark Ruffalo Bruce Banner, Hulk Actor Zoe Saldaña Gamora Actor Chris Evans Steve Rogers Actor Chris Pratt Peter Quill, Star-Lord Actor Benedict Cumberbatch Dr. Stephen Strange Actor Dave Bautista Drax Actor Don Cheadle James Rhodes, War Machine Actor Tom Holland Peter Parker, Spider-Man Actor Paul Bettany Vision Actor Elizabeth Olsen Wanda Maximoff, Scarlet Witch Actor Scarlett Johansson Natasha Romanoff, Black Widow Actor Anthony Mackie Sam Wilson, Falcon Actor Sebastian Stan Bucky Barnes, Winter Soldier Actor Danai Gurira Okoye Actor Letitia Wright Shuri Actor Karen Gillan Nebula Actor Peter Dinklage Eitri Actor Bradley Cooper Rocket Raccoon Voice Gwyneth Paltrow Pepper Potts Actor Vin Diesel Groot Voice Benicio del Toro The Collector Actor Tom Hiddleston Loki Actor Idris Elba Heimdall Actor Benedict Wong Wong Actor Pom Klementieff Mantis Actor William Hurt Secretary of State Thaddeus Ross Actor Tom Vaughan-Lawlor Ebony Maw Actor Terry Notary Cull Obsidian, On-Set Groot Actor Carrie Coon Proxima Midnight Voice Christopher Markus Screenwriter Stephen McFeely Screenwriter Kevin Feige Producer Louis D'Esposito Executive Producer Victoria Alonso Executive Producer Michael Grillo Executive Producer Trinh Tran Executive Producer Jon Favreau Executive Producer James Gunn Executive Producer Stan Lee Executive Producer Trent Opaloch Cinematographer Jeffrey Ford Film Editing Matthew Schmidt Film Editing Alan Silvestri Original Music Charles Wood Production Design Julian Ashby Art Director Jim Barr Art Director Thomas Brown Art Director Jordan Crockett Art Director Leslie Pope Set Decoration Judianna Makovsky Costume Design Sarah Halley Finn Casting