Robert Downey Jr. as Tony Stark / Iron Man

Chris Evans as Steve Rogers / Captain America

Chris Hemsworth as Thor

Josh Brolin as Thanos

Mark Ruffalo as Bruce Banner / Hulk

Scarlett Johansson as Natasha Romanoff / Black Widow

Don Cheadle as James Rhodes / War Machine

Benedict Cumberbatch as Doctor Strange

Tom Holland as Peter Parker / Spider-Man

Chadwick Boseman as T'Challa / Black Panther

Zoe Saldaña as Gamora

Karen Gillan as Nebula

Tom Hiddleston as Loki

Paul Bettany as Vision

Elizabeth Olsen as Wanda Maximoff / Scarlet Witch

Anthony Mackie as Sam Wilson / Falcon

Sebastian Stan as Bucky Barnes / Winter Soldier

Idris Elba as Heimdall

Danai Gurira as Okoye

Peter Dinklage as Eitri

Benedict Wong as Wong

Pom Klementieff as Mantis

Dave Bautista as Drax

Vin Diesel as Groot (voice)

Bradley Cooper as Rocket (voice)

Chris Pratt as Peter Quill / Star-Lord

Gwyneth Paltrow as Pepper Potts

Benicio del Toro as The Collector

Sean Gunn as On-Set Rocket

William Hurt as Secretary of State Thaddeus Ross

Letitia Wright as Shuri

Terry Notary as Cull Obsidian / On-Set Groot

Tom Vaughan-Lawlor as Ebony Maw

Carrie Coon as Proxima Midnight (voice)

Michael James Shaw as Corvus Glaive

Stan Lee as Bus Driver

Winston Duke as M'Baku

Florence Kasumba as Ayo

Kerry Condon as Friday (voice)

Monique Ganderton as On-Set Proxima Midnight

Jacob Batalon as Ned

Tiffany Espensen as Cindy

Isabella Amara as Sally

Ethan Dizon as Tiny

Ariana Greenblatt as Young Gamora

Ameenah Kaplan as Gamora's Mother

Ross Marquand as Red Skull (Stonekeeper)

Michael Anthony Rogers as Secretary Ross' Aide

Stephen McFeely as Secretary Ross' Aide

Aaron Lazar as Doctor Strange Double

Robert Pralgo as Thanos Reader

Olaniyan Thurmon as Teenage Groot Reader

Blair Jasin as Street Pedestrian #1

Matthew Zuk as Street Pedestrian #2

Laura Miller as Scottish News (STV) Reporter

Kenneth Branagh as Asgardian Distress Call (voice) (uncredited)

Samuel L. Jackson as Nick Fury (uncredited)

Cobie Smulders as Maria Hill (uncredited)

Harrison Osterfield as Boy on Bus (uncredited)

Gary Peebles as Kingsguard (uncredited)

Marija Abney as Dora Milaje (uncredited)

Zola Williams as Dora Milaje (uncredited)

Marie Mouroum as Dora Milaje (uncredited)

James Siderits as NYC Pedestrian (uncredited)

Precious Jenkins as Border Tribe Warrior (uncredited)

Bobby James as Border Tribe Warrior (uncredited)

Lady Cardinal as Street Pedestrian #3 (uncredited)

Tanya Wheelock as Washington Square Park Waitress (uncredited)

Robert Tinsley as Sanitation Worker (uncredited)