Four waves of increasingly deadly alien attacks have left most of Earth devastated, and most of the humans dead. Against a backdrop of fear and distrust, Cassie Sullivan is on the run, desperately trying to save her younger brother Sammy. As she prepares for the fifth wave, Cassie teams up with a young man named Evan, who may become her final hope – if she can only trust him.
Cassie Sullivan, an Ohio high-schooler armed with an M4 carbine, emerges from the woods seeing an abandoned gas station. She decides to raid the gas station for food.
- Chloë Grace Moretz as Cassie Sullivan
- Nick Robinson as Ben Parish
- Ron Livingston as Oliver Sullivan
- Maggie Siff as Lisa Sullivan
- Alex Roe as Evan Walker
- Maria Bello as Sergeant Reznik
- Maika Monroe as Ringer
- Liev Schreiber as Colonel Alexander Vosch
- Zackary Arthur as Sammy Sullivan
- Tony Revolori as Dumbo
- Talitha Bateman as Teacup