Pablo Schreiber as Master Chief
Yerin Ha as Kwan Ha
Natascha McElhone as Catherine Halsey
Jen Taylor as Cortana
Olive Gray as Miranda Keyes
Danny Sapani as Jacob Keyes
Shabana Azmi as Margaret Parangosky
Bokeem Woodbine as Soren-066
Kate Kennedy as Kai-125
Natasha Culzac as Riz-028
Bentley Kalu as Vannak-134
Charlie Murphy as Makee
Joseph Morgan as Ackerson