Halo (TV) Cast
The cast of Halo. Updated on August 17, 2025.
150 actors
Pablo Schreiber
as Master Chief, Spartan-117 / John-117 (17 episodes)

Pablo Schreiber plays Master Chief, Spartan-117 / John-117, a supersoldier fighting to protect humanity from the alien threat.

Natascha McElhone
as Dr. Catherine Halsey (17 episodes)

Natascha McElhone portrays Dr. Catherine Halsey, a brilliant scientist responsible for the creation of the Spartan soldiers.

Joseph Morgan
as James Ackerson (8 episodes)

Joseph Morgan takes on the role of James Ackerson, a high-ranking officer in the United Nations Space Command.

Shabana Azmi
as Margaret Parangosky (17 episodes)

Shabana Azmi plays Margaret Parangosky, a powerful figure within the military hierarchy of the United Nations Space Command.

Christina Bennington
as Cortana (8 episodes)

Christina Bennington provides the voice for Cortana, an advanced AI system assisting the Spartans in their missions.

Natasha Culzac
as Riz-028 (17 episodes)

Natasha Culzac is Riz-028, a skilled Spartan supersoldier and part of Master Chief's team.

Olive Gray
as Dr. Miranda Keyes (17 episodes)

Olive Gray plays Dr. Miranda Keyes, a scientist with significant importance in the ongoing conflict.

Yerin Ha
as Kwan Ha (17 episodes)

Yerin Ha portrays Kwan Ha, a civilian character caught up in the struggle between humans and the Covenant.

Bentley Kalu
as Vannak-134 (17 episodes)

Bentley Kalu is Vannak-134, a Spartan supersoldier fighting alongside Master Chief.

Kate Kennedy
as Kai-125 (17 episodes)

Kate Kennedy plays Kai-125, another member of the elite Spartan team battling the Covenant forces.

Charlie Murphy
as Makee (17 episodes)

Charlie Murphy portrays Makee, a character with deep ties to the covenant.

Fiona O'Shaughnessy
as Laera (11 episodes)

Fiona O'Shaughnessy takes the role of Laera, a character whose details are less defined in the narrative.

Cristina Rodlo
as Corporal Talia Perez (8 episodes)
Danny Sapani
as Jacob Keyes (17 episodes)

Danny Sapani plays the character Jacob Keyes in Halo. Keyes is a highly skilled military officer and a prominent figure in the Human-Covenant war.

Jen Taylor
as Cortana (voice) (17 episodes)

Jen Taylor provides the voice for Cortana, an artificial intelligence companion to Master Chief. Cortana assists Master Chief throughout the series, providing information and guidance during their missions.

Viktor Åkerblom
as Arbiter Var 'Gatanai (8 episodes)
Tylan Bailey
as Kessler (11 episodes)
Bokeem Woodbine
as Soren-066 (17 episodes)
Jamie Beamish
as Kaidon (3 episodes)
Nneka Okoye
as Djanka (1 episode)
Shaun Aylward
as Esso (1 episode)
Hayley Canham
as Cara (1 episode)
Zachary Hing
as Neru (1 episode)
Olivia Liu
as Faaz (1 episode)
Miklós Béres
as Sentry (1 episode)
Chan Woo Lim
as Flight Tech Doan (1 episode)
Mirjam Novak
as Flight Tech Tesic (1 episode)
Dávid Csányi
as Colonel Stacker (1 episode)
Sebastián Viveros
as Sergeant Mendez (1 episode)
Sarah Ridgeway
as John's Mother (3 episodes)
Khash-Erdene Ganbold
as Jong Sook (1 episode)
Ali Khan
as Attu (1 episode)
Isaura Barbé-Brown
as Katie Rios (1 episode)
Casper Knopf
as Young John (4 episodes)
Miranda Wilson
as Penma (1 episode)
Hans Peterson
as Ops Tech / Ops Tech Pereira (2 episodes)
Francisco Labbe
as David Agnoli (1 episode)
Iván Fenyő
as Bota (1 episode)
Johnny K. Palmer
as Control Tech Ladi (2 episodes)
Roderick Hill
as Major Ira Halal (1 episode)
Josette Simon
as Desiderata (1 episode)
Angie Cepeda
as Violetta Franco (1 episode)
Johann Myers
as Reth (1 episode)
Sky Yang
as Ruben (2 episodes)
Ian Pirie
as Professor (2 episodes)
Nóra Trokán
as Daranka (1 episode)
Jeong-hwan Kong
as Jin Ha (2 episodes)
Karl Akortia
as Marine Gunnery Sergeant (1 episode)
Amirreza Farajvand
as Marine Private (1 episode)
Jessica Fostekew
as Marine Sergeant Borovoi (1 episode)
Dávid Miller
as Murdo (1 episode)
Zsuzsanna Bíró
as Young Girl (1 episode)
Julian Bleach
as Hierarch Mercy (voice) (4 episodes)
Ryan McParland
as Dr. Adun Saly (8 episodes)
Gustavo Chiang
as MP Takacs (1 episode)
Burn Gorman
as Vinsher Grath (5 episodes)
Oladapo Oluwatosin Okunola
as MP Choksey (1 episode)
Jaram Lee
as Madrigal Elder (1 episode)
Samuel Tamunotoku Gbobo
as Marine Doyle (2 episodes)
Caroline Boulton
as Flight Technician Javal (1 episode)
Duncan Pow
as John's Father (3 episodes)
Hilton McRae
as Hierarch Regret (voice) (3 episodes)
Claudius Peters
as MP Malya (3 episodes)
Karen Gagnon
as Flight Tech Juric (2 episodes)
Karl Johnson
as Hierarch Truth (voice) (3 episodes)
Csémy Balázs
as Evans (1 episode)
Scott Karim
as Fazekas (1 episode)
Quynh Ngoc Do
as Marine Lieutenant Goy (1 episode)
Danielle Fiamanya
as UNSC Nurse (2 episodes)
Balázs Bölkény
as Wounded Marine (1 episode)
Felipe Gabriel Mariano
as Malchin (2 episodes)
Nila Aalia
as Agatha Terne (2 episodes)
Yuna Shin
as Soojin Ha (2 episodes)
Martin Fisher
as Raphael Bivas (1 episode)
J. Sebastian Lee
as Young Father (1 episode)
Péter Jankovics
as Filip (1 episode)
Gábor Nagypál
as Squirrel (1 episode)
Anna Trokán
as Trokan (1 episode)
Máté Bede-Fazekas
as Pete (1 episode)
Joshua Jo
as Man at the Well (1 episode)
Keir Dullea
as Fleet Admiral Hood (1 episode)
Jude Cudjoe
as Teenage Soren (1 episode)
Luke Polie
as Captain Nix (1 episode)
Benjamin Wainwright
as Gunnery Sgt Boone (1 episode)
Olwen Fouéré
as The Mother (4 episodes)
Sam Gittins
as Corporal Sims (1 episode)
Micah Karns
as Corporal Fisk (1 episode)
Genesis Lynea
as Lance Corporal Bowman (1 episode)
Luke Davis
as Private Rand (1 episode)
Blake Patrick Anderson
as Felix (1 episode)
Josie Lawrence
as Minnie (1 episode)
Ashwin Varma
as Refugee Husband (1 episode)
Vivien Nagy
as Refugee Wife (1 episode)
Tomi May
as Baz (1 episode)
Kamilla Szász
as Vera (1 episode)
Juliette Motamed
as Carina (3 episodes)
Franc Ashman
as Ruby Ann (1 episode)
David Crowley
as Castor (3 episodes)
Iliasz Shweirif
as Virgil (3 episodes)
Ivanno Jeremiah
as Antares (3 episodes)
For the best insights and data about the TV show Halo, visit our main Halo page.