In one of the most surprising casting announcements to emerge from San Diego Comic-Con 2026, Prime Video revealed that actor Simon Pegg has joined the cast of The Rings of Power for its upcoming third season. According to reporting from Variety, Pegg will provide the voice for the Balrog, the ancient fire demon that has lurked beneath Khazad-dûm since Season 1. Prime Video confirmed that in Season 3, the creature will not only speak but will actively assist Sauron, played by Charlie Vickers, as he forged the One Ring during the War of the Elves and Sauron.
Simon Pegg has been cast as the voice of the Balrog in The Rings of Power Season 3. (Photo: Gage Skidmore / CC BY-SA 3.0)
The decision to give the Balrog dialogue and a direct hand in ring-making represents ANOTHER dramatic shift from J.R.R. Tolkien’s story. In Tolkien’s writings, Balrogs (or Valaraukar) were primordial spirits of fire, Maiar who had been corrupted by Morgoth in the First Age. While they possessed high intelligence and power, Tolkien never wrote of a Balrog holding conversations with mortals or assisting Sauron in his Second Age schemes. The specific Balrog of Khazad-dûm fled the destruction of Beleriand after the War of Wrath and hid in the deep foundations of the Misty Mountains, where it slept undisturbed until Dwarf miners awakened it in Third Age 1980.
Showrunners J.D. Payne and Patrick McKay have positioned Season 3 around the escalation of open war across Middle-earth, with Sauron needing every weapon at his disposal to forge the One Ring and subjugate the Elven realms. Placing a Balrog directly alongside Sauron in the forge gives the production a striking visual and narrative centerpiece, but it requires rewriting the creature’s established role in Middle-earth history. For fans who value Tolkien’s careful chronology, seeing a Balrog active during the Second Age alongside Sauron will be a difficult change to reconcile.
Pegg, best known for his roles in Shaun of the Dead, Star Trek, and Mission: Impossible, brings considerable voice-acting experience to the role. Will a speaking Balrog can feel grounded within Tolkien’s world? I think it can — but of course, The Rings of Power isnt Tolkien’s world.
