Chloë Grace Moretz as Cassiopeia "Cassie" Sullivan

Nick Robinson as Ben "Zombie" Parish

Ron Livingston as Oliver Sullivan

Maggie Siff as Lisa Sullivan

Alex Roe as Evan Walker

Maria Bello as Sergeant Reznik

Maika Monroe as Marika "Ringer" Kimura

Zackary Arthur as Sammy "Nugget" Sullivan

Liev Schreiber as Lieutenant Colonel Alexander Vosch

Tony Revolori as Dumbo

Talitha Eliana Bateman as Allison / "Teacup"

Nadji Jeter as Poundcake

Alex MacNicoll as Flintstone

Matthew Zuk as Wounded Man with Crucifix

Gabriela Lopez as Lizbeth Morgan

Bailey Anne Borders as Julia

David Maldonado as Soccer Coach

Paul Ryden as TV News Anchor

E. Roger Mitchell as White House Spokesman

Charmin Lee as Ms. Paulson

Parker Wierling as Jeremy

Madison Staines as Teary School Kid

Terry Serpico as Hutchfield

Derek Roberts as Private Parker

Geoffrey Kennedy as Bullhorn Soldier

Devin McGee as Confused Man

Justin Smith as Armed Man

Jim Sutton as Soldier Calling Numbers

Adora Dei as Exam Room Tech

Kevin L. Johnson as Sniper in Woods

Cade Canon Ball as Kenny / "Oompa"

Flynn McHugh as Tank

Courtney Munch as Helicopter Soldier

Kendrick Cross as Situation Room Soldier

Chelsea Hayes as Tech Soldier

Michael Beasley as Major Bob

Olivia Cloer as Captured Teen (uncredited)

Kelly Róisín as Quarantine Victim (uncredited)

Johnny Otto as Dr. Osborne (uncredited)