Pablo Schreiber plays Master Chief John-117, Natascha McElhone plays Dr. Catherine Halsey, and Jen Taylor plays Cortana in the Paramount+ series Halo.
Main cast
- Master Chief John-117Pablo Schreiber1–2Main
- Dr. Catherine HalseyNatascha McElhone1–2Main
- CortanaJen Taylor1–2Main
- Kai-125Kate Kennedy1–2Main
- Soren-066Bokeem Woodbine1–2Main
- MakeeCharlie Murphy1Main
- Captain Jacob KeyesDanny Sapani1–2Main
- ParangoskyShabana Azmi2Main
Supporting cast
- Riz-028Natasha Culzac1–2Supp
- Vannak-134Bentley Kalu1–2Supp
- Admiral Margaret ParangoskyShabana Azmi2Supp
- James AckersonJoseph Morgan2Supp
- LaeraFiona O’Shaughnessy1–2Supp
- Kwan HaYerin Ha1Supp
Guest & voice
- Admiral HoodKeir Dullea1Guest
- Captain Miranda KeyesOlive Gray1–2Guest
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About this cast
Halo is a military science fiction television series based on the video game franchise of the same name, produced by Showtime and streamed on Paramount+. The show follows the super-soldier Master Chief John-117 and his AI companion Cortana as they battle the alien Covenant, while also exploring the origins of the Spartan program.
FAQs
Who plays Master Chief in Halo?
Pablo Schreiber plays Master Chief John-117 in the Halo TV series.
Who plays Cortana in Halo?
Jen Taylor, who also voiced Cortana in the video games, plays the character in the TV series.
Who plays Dr. Halsey in Halo?
Natascha McElhone plays Dr. Catherine Halsey, the creator of the Spartan program.
Is the Halo TV series connected to the games?
The series exists in a separate timeline known as the ‘Silver Timeline’, taking inspiration from the games but telling an original story.
How many seasons of Halo are there?
There are two seasons, released in 2022 and 2024. The series was cancelled after season 2.
Sources & where to watch: IMDb · Wikipedia · Where to watch (JustWatch UK) · Updated June 2026