- "They were once men. Great kings of men. Then Sauron the Deceiver gave to them nine Rings of Power. Blinded by their greed, they took them without question, one by one falling into darkness. Now they are slaves to his will. They are the Nazgûl. Ringwraiths. Neither living nor dead. At all times they feel the presence of the Ring, drawn to the power of the One. They will never stop hunting you."
- ―Aragorn revealing the Ringwraiths' origin in The Fellowship of the Ring.
The Ringwraiths wear a black hood and a tattered cloak. They have a blank black head, and a black torso which printing has a robe design. The back of their torso features a continuation of his robe printing. Their legs, arms, and hands are also coloured in black.
The Ringwraiths were originally nine kings of Men, tempted one by one by the Dark Lord Sauron using his One Ring over their nine rings, through betrayal, greed, suppression, or alliance. They resided in the cursed fortress of Minas Morgul ruled by the first Nazgûl, the Witch-king of Angmar. They were assigned to hunt down Frodo Baggins and reclaim the One Ring for their master Sauron. They tracked Frodo, Aragorn and company across the Shire, finally finding them at Weathertop where Aragorn defeated them using fire. However, not before the Witch-king stabbed Frodo with a cursed Morgul blade. Arwen, the daughter of Elrond, then took the fading Frodo to Rivendell to be saved be her father, and the Nazgûl steeds were swept away by the waters of Bruinen. After this the Nazgûl reverted to riding the dragon-like Fell Beasts. The Witch-king was later defeated by Éowyn at the Battle of the Pelennor Fields as justice for killing King Théoden. Khamùl and the other remaining seven Nazgul were killed when the Ring was destroyed, caught in the fire storm of Mount Doom.
- Gollum's actor Andy Serkis provided the uncredited voice for Khamûl in The Lord of the Rings: The Fellowship of the Ring. In addition, Serkis also played Ulysses Klaue in the Marvel Cinematic Universe and Supreme Leader Snoke in the Star Wars films.
- The Ringwraiths appeared with individualized ghostly appearances in The Hobbit: The Battle of the Five Armies, but these were not produced-with the exception of the Witch-King-in either physical or video game form.