James McAvoy

Patricia / Dennis / Hedwig / The Beast / Barry / Heinrich / Jade / Ian / Mary Reynolds / Norma / Jalin / Kat / B.T. / Kevin Wendell Crumb / Mr. Pritchard / Felida / Luke / Goddard / Samuel / Polly

Bruce Willis

David Dunn / The Overseer

Samuel L. Jackson

Elijah Price / Mr. Glass

Sarah Paulson

Dr. Ellie Staple

Anya Taylor-Joy

Casey Cooke

Spencer Treat Clark

Joseph Dunn

Charlayne Woodard

Mrs. Price

Luke Kirby

Pierce

Adam David Thompson

Daryl

M. Night Shyamalan

Jai, Security Guard

Shannon Destiny Ryan

Cheerleading Girl

Diana Silvers

Cheerleading Girl

Nina Wisner

Cheerleading Girl

Kyli Zion

Cheerleading Girl

Serge Didenko

Ronald, Powerful Young Man

Russell Posner

T, Skinny Camera Kid

Kimberly S. Fairbanks

Assistant Principal

Rosemary Howard

Penelope Crumb

Bryan McElroy

Clarence Crumb

Owen Vitullo

Young Kevin

William Turner

Young Elijah

Johnny Hiram Jamison

Thirteen Year-Old Elijah (archive footage)

Leslie Stefanson

Woman on Train

Marc H. Glick

Train Engineer

Brick Mason

Carnival Barker

Bostin Christopher

Comic Book Counter Guy

Ukee Washington

News Anchor

Colin Becker

Ten Year-Old David

Brian Anthony Wilson

Security Guard in Car

Tobias Segal

Surveillance Security Guard

Joseph Thuet

Joe, Security Guard

Tatiana St. Phard

Woman Group Member

Tom DiNardo

Homeless Person

Timothy Chivalette

Comic Book Geek

Jack McCafferty

Comic Book Geek

Darby Schlosser

Foster Sibling

Jordan Coker

Foster Sibling

Emma Hong

Foster Sibling

Xaiver Gerald

Foster Sibling

Tim Duquette

Patient Jimmy

Nathan Nauroth

Orderly Harrison

Ana Leonard

Hospital Volunteer

Elijah Davis

Maintenance worker (uncredited)

Charles W Harris III

Officer Williams (uncredited)

Jesse Ridgway

College Student (uncredited)

Aaron Bartuska

Student (uncredited)

Jane Justice Park

Korean Mother (uncredited)

Jesse Bradley

Passerby