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 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 Justin Matthew Smith Armed Man Adora Dei Exam Room Tech Kevin L. Johnson Sniper in Woods 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)