Full cast of What If...?

Jeffrey Wright

The Watcher (voice)

26 episodes

Terri Douglas

Additional Voices (voice)

25 episodes

Matthew Wood

Additional Voices (voice)

22 episodes

Fred Tatasciore

Additional Voices (voice) / Groot (voice) / Drax / Corvus Glaive (voice) / Volstagg / Drax / Additional Voices (voice)

15 episodes

Robin Atkin Downes

Additional Voices (voice)

14 episodes

Shelby Young

Additional Voices (voice)

10 episodes

Debra Wilson

Additional Voices (voice)

9 episodes

Dave B. Mitchell

Additional Voices (voice)

9 episodes

Helen Sadler

Additional Voices (voice)

9 episodes

Piotr Michael

Additional Voices (voice) / General Dreykov (voice)

8 episodes

Hayley Atwell

Peggy Carter / Captain Carter (voice) / Captain Carter / Peggy Carter (voice) / Peggy Carter (voice)

8 episodes

Sebastian Stan

Bucky Barnes (voice) / Bucky Barnes / Winter Soldier (voice) / Bucky Barnes / The Winter Soldier (voice)

7 episodes

Samuel L. Jackson

Nick Fury (voice) / Sir Fury (voice)

7 episodes

Josh Keaton

Steve Rogers / Captain America (voice) / Steve Rogers (voice) / Steve Rogers / The Hydra Stomper (voice) / Skinny Steve Rogers (voice) / Steve Rogers / Rogers Hood (voice)

7 episodes

Mick Wingert

Tony Stark / Iron Man (voice) / Tony Stark (voice)

7 episodes

Kari Wahlgren

Additional Voices (voice) / Melina Vostkoff (voice) / Carina (voice)

7 episodes

Michael Ralph

Additional Voices (voice)

6 episodes

Benedict Cumberbatch

Doctor Strange (voice) / Doctor Strange / Strange-Supreme (voice) / Doctor Strange / Strange Supreme (voice) / Strange Supreme / Demon Strange (voice)

6 episodes

Ross Marquand

Infinity Ultron (voice) / Ultron / Sub-Ultron Sentries (voice) / Ultron (voice) / Johann Schmidt / Red Skull (voice) / Werner (voice)

6 episodes

Lake Bell

Natasha Romanoff / Black Widow (voice) / Natasha Romanoff (voice)

6 episodes

Chris Hemsworth

Thor (voice) / King Thor Odinson (voice)

6 episodes

Seth Green

Howard the Duck (voice)

5 episodes

Mark Ruffalo

Bruce Banner / Hulk (voice) / Bruce Banner (voice) / Bruce Banner / Hulk / Mega-Hulk (voice)

5 episodes

Secunda Wood

Additional Voices (voice)

5 episodes

Tom Hiddleston

Loki (voice) / Frost Giant Loki (voice)

5 episodes

Andrew Morgado

Additional Voices (voice) / Laufey (voice)

5 episodes

Taika Waititi

Korg (voice)

4 episodes

Karen Gillan

Nebula (voice)

4 episodes

Chadwick Boseman

T'Challa / Black Panther (voice) / Star Lord T'Challa (voice)

4 episodes

June Christopher

Additional Voices (voice)

4 episodes

Jeremy Renner

Clint Barton / Hawkeye (voice)

4 episodes

Alexandra Daniels

Carol Danvers / Captain Marvel (voice)

4 episodes

Frank Grillo

Brock Rumlow (voice)

4 episodes

Kat Dennings

Darcy (voice) / Darcy Lewis (voice)

4 episodes

Arthur Ortiz

Additional Voices (voice)

4 episodes

Jon Favreau

Happy Hogan (voice) / Happy Hogan / Zombie Happy (voice) / Sir Harold 'The Happy' Hogan / Happy 'The Freak' Hogan (voice) / Happy Hogan / Happy 'The Freak' Hogan (voice)

4 episodes

David W. Collins

Additional Voices (voice)

4 episodes

Devery Jacobs

Kahhori (voice)

4 episodes

Darin De Paul

The Executioner (voice) / Zeus (voice)

4 episodes

Jason Isaacs

The Eminence (voice)

4 episodes

Josh Brolin

Thanos (voice)

3 episodes

Tom Vaughan-Lawlor

Ebony Maw (voice)

3 episodes

Matthew Yang King

Additional Voices (voice)

3 episodes

Danai Gurira

Okoye (voice)

3 episodes

Michael Rooker

Yondu (voice) / Yondu Udonta (voice)

3 episodes

Rachel House

Topaz (voice)

3 episodes

Clancy Brown

Surtur (voice)

3 episodes

Kaitlyn Robrock

Additional Voices (voice)

3 episodes

Toby Jones

Arnim Zola (voice)

3 episodes

Kimberly Bailey

Additional Voices (voice)

3 episodes

Kurt Russell

Ego (voice) / Ego / Ego's Computer / Ego's Army (voice)

3 episodes

Melanie Minichino

Additional Voices (voice)

3 episodes

Matt Lowe

Additional Voices (voice)

3 episodes

Clark Gregg

Agent Coulson (voice) / Agent Phil Coulson (voice)

3 episodes

Ozioma Akagha

Shuri (voice) / Adolescent Girl (voice)

3 episodes

Matthew Wolf

Additional Voices (voice)

3 episodes

D. C. Douglas

The Incarnate (voice)

3 episodes

Dominic Cooper

Howard Stark (voice)

2 episodes

Stanley Tucci

Dr. Erskine (voice)

2 episodes

Shane Sweet

Additional Voices (voice)

2 episodes

Paul Rudd

Scott Lang / Ant-Man (voice)

2 episodes

Emily VanCamp

Sharon Carter (voice)

2 episodes

Paul Bettany

Jarvis (voice) / Vision (voice)

2 episodes

David Boat

Additional Voices (voice)

2 episodes

Leslie Bibb

Christine Everhart (voice)

2 episodes

John Kani

T'Chaka (voice)

2 episodes

Don Fullilove

Additional Voices (voice)

2 episodes

Michael Patrick McGill

General Ross (voice)

2 episodes

Jeff Goldblum

Grandmaster (voice)

2 episodes

Cobie Smulders

Maria Hill (voice)

2 episodes

Jaimie Alexander

Lady Sif (voice)

2 episodes

Michael Douglas

Hank Pym / Yellow Jacket (voice) / Dr. Hank Pym / Ant-Man (voice)

2 episodes

Isaac Robinson-Smith

Brick (voice) / Sergei / Additional Voices (voice)

2 episodes

Ashley Peldon

Additional Voices (voice)

2 episodes

Brian T. Delaney

Peter Quill (voice)

2 episodes

Michael B. Jordan

Killmonger (voice)

2 episodes

Cynthia Kaye McWilliams

Gamora (voice)

2 episodes

Chuck Billy

Additional Voices (voice)

2 episodes

Shondalia White

Additional Voices (voice)

2 episodes

Justin Shaw

Additional Voices (voice)

2 episodes

Tanya Wheelock

Additional Voices (voice) / Female Ravager (voice)

2 episodes

Scott Menville

Additional Voices (voice)

2 episodes

Kiff VandenHeuvel

Obadiah Stane (voice) / Obadiah Stane / The Rook (voice)

2 episodes

Toby Larsen

Additional Voices (voice)

2 episodes

Luke Lowe

Additional Voices (voice)

2 episodes

Lucy Lowe

Additional Voices (voice)

2 episodes

Maggie Lowe

Additional Voices (voice)

2 episodes

Tessa Thompson

Valkyrie (voice)

2 episodes

Elizabeth Olsen

Wanda-Merlin (voice)

2 episodes

David Chen

Wong / Additional Voices (voice) / Hogun / Additional Voices (voice)

2 episodes

Jeff Bergman

Odin (voice)

2 episodes

Laurence Fishburne

Dr. Bill Foster / Goliath (voice) / Bill Foster / Goliath (voice)

2 episodes

Gene Farber

Vasily Karpov (voice) / Karpov / Russian Handler (voice)

2 episodes

Cate Blanchett

Hela (voice)

2 episodes

Feodor Chin

Xu Wenwu (voice) / Wenwu (voice)

2 episodes

Marcella Lentz-Pope

Additional Voices (voice)

2 episodes

Simu Liu

Shang-Chi (voice)

2 episodes

David Harbour

Alexei Shostakov (voice) / Alexei Shostakov / Red Guardian (voice)

2 episodes

Alison Sealy-Smith

Storm (voice)

2 episodes

Natasha Lyonne

Byrdie (voice)

2 episodes

Neal McDonough

Dum Dum Dugan (voice)

1 episode

Darrell Hammond

Nazi General (voice)

1 episode

Bradley Whitford

Colonel Flynn (voice)

1 episode

Andreas Beckett

Additional Voices (voice)

1 episode

David Cowgill

Additional Voices (voice)

1 episode

Matt Lindquist

Additional Voices (voice)

1 episode

Carrie Coon

Proxima Midnight (voice)

1 episode

Djimon Hounsou

Korath (voice)

1 episode

Benicio del Toro

The Collector (voice)

1 episode

Sean Gunn

Kraglin (voice)

1 episode

Chris Sullivan

Taserface (voice)

1 episode

Ophelia Lovibond

Carina (voice)

1 episode

Maddix Robinson

Young T'Challa (voice)

1 episode

David Sobolov

Additional Voices (voice)

1 episode

Michael Woodley

Additional Voices (voice)

1 episode

Stephanie Panisello

Betty Ross (voice)

1 episode

Elisa Gabrielli

Additional Voices (voice)

1 episode

David Michie

Additional Voices (voice)

1 episode

Rachel McAdams

Christine Palmer (voice)

1 episode

Benedict Wong

Wong (voice)

1 episode

Tilda Swinton

The Ancient One (voice)

1 episode

Ike Amadi

O'Bengh (voice)

1 episode

Evangeline Lilly

Hope Van Dyne / Wasp (voice)

1 episode

David Dastmalchian

Kurt (voice)

1 episode

Hudson Thames

Peter Parker / Spider-Man (voice)

1 episode

Ashley Adler

Additional Voices (voice)

1 episode

Mike Vaughn

Additional Voices (voice)

1 episode

Angela Bassett

Queen Ramonda (voice)

1 episode

Andy Serkis

Ulysses Klaue (voice)

1 episode

Don Cheadle

Rhodey (voice)

1 episode

Beth Hoyt

Pepper Potts (voice)

1 episode

Khanya Mkhize

Additional Voices (voice)

1 episode

Natalie Portman

Jane Foster (voice)

1 episode

Josette Eales

Frigga (voice)

1 episode

Georges St-Pierre

Batroc (voice)

1 episode

Max Mittelman

Fandral / Additional Voices (voice)

1 episode

Peter Serafinowicz

Garthan Saal (voice)

1 episode

Julianne Grossman

Nova Prime / Irani Rael

1 episode

Jude Law

Yon-Rogg (voice)

1 episode

Sam Rockwell

Justin Hammer (voice)

1 episode

John Slattery

Howard Stark (voice)

1 episode

Atandwa Kani

King T'Chaka / Black Panther (voice)

1 episode

Madeleine McGraw

Hope van Dyne (voice)

1 episode

Mace Montgomery Miskel

Peter Quill (voice)

1 episode

Keri Tombazian

Dr. Wendy Lawson / Mar-Vell (voice)

1 episode

Arif S. Kinchen

Additional Voices (voice)

1 episode

Matthew Waterson

Rusty (voice)

1 episode

Anastasia Baranova

Additional Voices (voice)

1 episode

Rachel Weisz

Melina (voice)

1 episode

Bernard White

Councilman Singh (voice)

1 episode

Jon Bailey

Additional Voices (voice)

1 episode

Kim Mai Guest

Additional Voices (voice)

1 episode

Salli Saffioti

Additional Voices (voice)

1 episode

Kiawentiio

Wahta (voice)

1 episode

Jeremy White

Atahraks / Additional Voices (voice)

1 episode

Gabriel Romero

Conquistador Gonzolo (voice)

1 episode

Carolina Ravassa

Queen Isabella of Spain (voice)

1 episode

Iotsi'tsanien Goodleaf

Additional Voices (voice)

1 episode

Ránikonhrí:io Lazare

Additional Voices (voice)

1 episode

Sahawisó:ko' Arquette

Additional Voices (voice)

1 episode

Tehtotsnháthe Lazare

Additional Voices (voice)

1 episode

Tekanhé:kake Stacey

Additional Voices (voice)

1 episode

Alexa Iekenhnhenhá;wi Montour

Additional Voices (voice)

1 episode

Kahentinéhshon Alfred

Additional Voices (voice)

1 episode

Richard Miro

Additional Voices (voice)

1 episode

Christian Rodrigo

Additional Voices (voice)

1 episode

Jordi Caballero

Additional Voices (voice)

1 episode

Christopher Lee Pearson

Additional Voices (voice)

1 episode

Ieronhienhawi Tatum McComber

Additional Voices (voice)

1 episode

Carlos Reig-Plaza

Additional Voices (voice)

1 episode

Lauren Tom

Jiayi (voice)

1 episode

Idris Elba

Heimdall (voice)

1 episode

Michael Hagiwara

Shunyuan (voice)

1 episode

Liv Zamora

Young Hela (voice)

1 episode

Vic Chao

Additional Voices (voice)

1 episode

Karen Huie

Additional Voices (voice)

1 episode

Paul Kwo

Additional Voices (voice)

1 episode

James Taku Leung

Additional Voices (voice)

1 episode

Anthony Mackie

Sam Wilson (voice)

1 episode

Teyonah Parris

Monica Rambeau (voice)

1 episode

Oscar Isaac

Moon Knight (voice)

1 episode

Brittany Adebumola

Nakia (voice)

1 episode

Alexandra Smith

Additional Voices (voice)

1 episode

Alejandro Saab

Quentin Beck (voice)

1 episode

Kathryn Hahn

Agatha Harkness (voice)

1 episode

Kumail Nanjiani

Kingo (voice)

1 episode

James D'Arcy

Edwin Jarvis (voice)

1 episode

David Kaye

Arishem (voice)

1 episode

America Ferrera

Ranger Morales (voice)

1 episode

Zeno Robinson

Additional Voices (voice)

1 episode

Matthew Friend

The Grandmaster (voice)

1 episode

Jared Butler

Kaecilius (voice)

1 episode

Steve French

Malekith (voice)

1 episode

Hamish Parkinson

Beerbot 5000 (voice)

1 episode

Akai Robinson

Additional Voices (voice)

1 episode

Dominique Thorne

Riri Williams (voice)

1 episode

Michelle Wong

Ying Nan (voice)

1 episode

Kenna J. Ramsey

Okoye (voice)

1 episode

Hailee Steinfeld

Kate Bishop (voice)

1 episode

Wyatt Russell

John Walker (voice)

1 episode

Zhang Meng'er

Xialing (voice)

1 episode

Walton Goggins

Sonny Burch (voice)

1 episode

Deng Lun

Kwai Jun-Fan (voice)

1 episode