Prince Khor-Ru was the cousin of King Tut. After his death, he was mummified. Centuries later, Ben Hassad and his crew begin to search his pyramid for his ancient treasures. Along with Ben is his daughter Sari and his nephew Gabe. They soon meet a woman named Nila Rahmad, who is posing as a journalist; she carries around her neck an amulet containing a piece of amber. Uncle Ben later tells Gabe about the magic words "Teki Kahru Teki Kahra Teki Khari", which, if uttered five times in succession, will awaken Khor-Ru. Later, Gabe utters the chant five times. Soon, they begin to get worried when Uncle Ben doesn't return from the pyramid. After seeing Dr. Omar Fielding run off, they decide to enter the pyramid. They enter Khor-Ru's treasure room and find Uncle Ben unconscious. They also see Nila and a now awakened Prince Khor-Ru, who Nila reveals to be her brother.
During the confrontation with Gabe and Sari, Nila calls on her brother to kill the children, but the mummy walks right by them and instead starts choking his sister. "Let me rest in peace," the mummy groans as he assaults Nila. Gabe intervenes and accidentally pulls off Nila's amulet; it crashes to the ground shattering into a thousand shards. Nila howls out, and tells Gabe that the pendant was how she stayed alive all these years, and at night she would revert into a scarab and climb inside the amber; she then shrinks down into the scarab beetle and scurries away into the dark pyramid. Prince Khor-Ru then returns to his slumber. Uncle Ben awakens and tells Gabe that Nila was the one who awakened Khor-Ru, which is why Dr. Fielding ran away.
In the television adaptation of Return of the Mummy, Prince Khor-Ru was portrayed by actor/mime artist Peter Jarvis, who also played the mummy in the television adaptation of Don't Wake Mummy.
Prince Khor-Ru made an appearance among other Goosebumps monsters in the Goosebumps film. He is portrayed by Brian Gabriel, but credited as "Monster #8." He is one of the least seen monsters in the film. However, he receives a close-up when he is sucked back into a manuscript; as his bandages are caught, Khor-Ru unravels while being sucked in.
Prince Khor-Ru reappears in Goosebumps 2: Haunted Halloween; he is portrayed by Benjamin Bladon, but credited as "Royal Mummy". In Haunted Halloween, he is a Goosebumps-themed costume brought to life by Slappy.
- Much of the 90's merchandise and promotional artwork featuring Prince Khor-Ru depicted him riding a skateboard, which is an odd addition considering that never happens in the book.
- Some pieces of merchandise would also use the cover art of The Curse of the Mummy's Tomb, despite Khor-Ru not appearing in that book.
- According to Welcome to HorrorLand: A Survival Guide, Khor-Ru is the distant cousin of Tuttan-Rha.