Anna Popplewell
as Chyler Silva
Enisha Brewster
as April Orenski
Masam Holden
as Michael "Sully" Sullivan
Tom Green
as Thomas Lasky
Iain Belcher
as Vickers
Osric Chau
as JJ Chen
Ayelet Zurer
as Colonel Mehaffey
Kat De Lieva
as Dimah Tchakova
Daniel Cudmore
as Master Chief Petty Officer John-117
Mike Dopud
as General Black