Joyce Byers

Winona Ryder

Chief Jim Hopper

David Harbour

Mike Wheeler

Finn Wolfhard

Nancy Wheeler

Natalia Dyer

Eleven / Jane Hopper

Millie Bobby Brown

Karen Wheeler

Cara Buono

Dustin Henderson

Gaten Matarazzo

Lucas Sinclair

Caleb McLaughlin

Jonathan Byers

Charlie Heaton

Will Byers

Noah Schnapp

Dr. Martin Brenner

Matthew Modine

Steve Harrington

Joe Keery

Billy

Dacre Montgomery

Troy Harrington

Peyton Wich

Max

Sadie Sink

Roman/Kali

Linnea Berthelsen

Erica Sinclair

Priah Ferguson

Bob Newby

Sean Astin

Robin Buckley

Maya Hawke

Dr. Sam Owens

Paul Reiser

Mayor Larry Kline

Cary Elwes

Murray

Brett Gelman

Ted Wheeler

Joe Chrest

Bruce

Jake Busey

Robert Englund

Argyle

Eduardo Franco

Vecna / Friendly Orderly

Jamie Campbell Bower

Jamie Campbell

Officer Callahan

John Reynolds

Lt. Col. Jack Sullivan

Sherman Augustus

Officer Powell / Chief Powell

Rob Morgan

Jason Carver

Mason Dye

Yuri

Nikola Djuricko

Mr. Clarke

Randy Havens

Eddie Munson

Joseph Quinn

Holly Wheeler

Tinsley Price

Dmitri Antonov

Tom Wlaschiha

Claudia Henderson

Catherine Curtin

Florence / Florence (voice)

Susan Shalhoub Larkin

Andy

Clayton Royal Johnson

Holly Wheeler

Nell Fisher

Dr. Kay

Linda Hamilton

Holly Wheeler

Anniston Price

Terry Ives

Aimee Mullins

Vickie

Amybeth McNulty

Tommy H.

Chester Rushing

Grigori

Andrey Ivchenko

Lieutenant Robert Akers

Alex Breaux

Derek Turnbow

Jake Connelly

Mary

Calista Craig

Lead Agent

Tobias Jelinek

The Monster

Mark Steger

Heather Holloway

Francesca Reale

Patrick McKinney

Myles Truitt

Doris / Hospital Receptionist

Chantell D. Christopher

Carol

Chelsea Talmadge

Susan Hargrove

Jennifer L. Marshall

Debbie Miller

Eden Stephens

Glenn

Gianlucca Gazzo

Thomas

Carson Minniear

Teammate / Chance - Jock / Chance

Hunter Romanillos

Tom Holloway

Michael Park

Agent Wallace

Kendrick Cross

Mrs. Sinclair

Karen Ceesay

Young Eleven

Martie Marie Blair

Two

Tristan Spohn

Nine

Chloe Adona

Fourteen

Jeremiah Friedlander

Three

Morgan Gao

Sixteen

Ethan J Green

Seventeen

Oliver J Green

Twelve

David Alexander Kaplan

Five

Jessica Arden Napier

Eighteen

Olivia Sembra

Seven

Lana Jean Turner

Fifteen

Bentley Williams

Thirteen

Hendrix Yancey

Warden Melnikov

Vaidotas Martinaitis

Agent Stinson

Paris Benjamin

Wendy

Alyse Elna Lewis

Valerie

Olive Elise Abercrombie

Benji

Kingston James

Barbara Holland

Shannon Purser

Agent Connie Frazier

Catherine Dyer

Young Henry Creel / Teenage Henry

Raphael Luce