Chloë Grace Moretz
Cassiopeia "Cassie" Sullivan

Nick Robinson
Ben "Zombie" Parish

Ron Livingston
Oliver Sullivan

Maggie Siff
Lisa Sullivan

Alex Roe
Evan Walker

Maria Bello
Sergeant Reznik

Maika Monroe
Marika "Ringer" Kimura

Zackary Arthur
Sammy "Nugget" Sullivan

Liev Schreiber
Lieutenant Colonel Alexander Vosch

Tony Revolori
Dumbo

Talitha Eliana Bateman
Allison / "Teacup"

Nadji Jeter
Poundcake

Alex MacNicoll
Flintstone

Matthew Zuk
Wounded Man with Crucifix

Gabriela Lopez
Lizbeth Morgan

Bailey Anne Borders
Julia

David Maldonado
Soccer Coach

Paul Ryden
TV News Anchor

E. Roger Mitchell
White House Spokesman

Charmin Lee
Ms. Paulson

Parker Wierling
Jeremy

Terry Serpico
Hutchfield

Derek Roberts
Private Parker

Geoffrey Kennedy
Bullhorn Soldier

Devin McGee
Confused Man

Adora Dei
Exam Room Tech

Kevin L. Johnson
Sniper in Woods

Cade Canon Ball
Kenny / "Oompa"

Flynn McHugh
Tank

Courtney Munch
Helicopter Soldier

Kendrick Cross
Situation Room Soldier

Michael Beasley
Major Bob

Kelly Róisín
Quarantine Victim (uncredited)

Johnny Otto
Dr. Osborne (uncredited)