Chloë Grace Moretz

Character: Cassiopeia "Cassie" Sullivan

Nick Robinson

Character: Ben "Zombie" Parish

Ron Livingston

Character: Oliver Sullivan

Maggie Siff

Character: Lisa Sullivan

Alex Roe

Character: Evan Walker

Maria Bello

Character: Sergeant Reznik

Maika Monroe

Character: Marika "Ringer" Kimura

Zackary Arthur

Character: Sammy "Nugget" Sullivan

Liev Schreiber

Character: Lieutenant Colonel Alexander Vosch

Tony Revolori

Character: Dumbo

Talitha Eliana Bateman

Character: Allison / "Teacup"

Nadji Jeter

Character: Poundcake

Alex MacNicoll

Character: Flintstone

Matthew Zuk

Character: Wounded Man with Crucifix

Gabriela Lopez

Character: Lizbeth Morgan

Bailey Anne Borders

Character: Julia

David Maldonado

Character: Soccer Coach

Paul Ryden

Character: TV News Anchor

E. Roger Mitchell

Character: White House Spokesman

Charmin Lee

Character: Ms. Paulson

Parker Wierling

Character: Jeremy

Madison Staines

Character: Teary School Kid

Terry Serpico

Character: Hutchfield

Derek Roberts

Character: Private Parker

Geoffrey Kennedy

Character: Bullhorn Soldier

Devin McGee

Character: Confused Man

Justin Smith

Character: Armed Man

Jim Sutton

Character: Soldier Calling Numbers

Adora Dei

Character: Exam Room Tech

Kevin L. Johnson

Character: Sniper in Woods

Cade Canon Ball

Character: Kenny / "Oompa"

Flynn McHugh

Character: Tank

Courtney Munch

Character: Helicopter Soldier

Kendrick Cross

Character: Situation Room Soldier

Chelsea Hayes

Character: Tech Soldier

Michael Beasley

Character: Major Bob

Olivia Cloer

Character: Captured Teen (uncredited)

Kelly Róisín

Character: Quarantine Victim (uncredited)

Johnny Otto

Character: Dr. Osborne (uncredited)