Casting (30)
Pablo Schreiber
Master Chief, Spartan-117 / John-117
Natascha McElhone
Dr. Catherine Halsey
Shabana Azmi
Margaret Parangosky
Natasha Culzac
Riz-028
Olive Gray
Dr. Miranda Keyes
Yerin Ha
Kwan Ha
Bentley Kalu
Vannak-134
Kate Kennedy
Kai-125
Charlie Murphy
Makee
Danny Sapani
Jacob Keyes
Jen Taylor
Cortana (voice)
Bokeem Woodbine
Soren-066
Fiona O'Shaughnessy
Laera
Tylan Bailey
Kessler
Joseph Morgan
James Ackerson
Christina Bennington
Cortana
Cristina Rodlo
Corporal Talia Perez
Viktor Åkerblom
Arbiter Var 'Gatanai
Ryan McParland
Dr. Adun Saly
Burn Gorman
Vinsher Grath
Casper Knopf
Young John
Julian Bleach
Hierarch Mercy (voice)
Olwen Fouéré
The Mother
Jamie Beamish
Kaidon
Sarah Ridgeway
John's Mother
Hans Peterson
Ops Tech / Ops Tech Pereira
Duncan Pow
John's Father
Hilton McRae
Hierarch Regret (voice)
Claudius Peters
MP Malya
Karl Johnson
Hierarch Truth (voice)