|Grinnah is a concept which has only appeared in an adaptation of the works of J.R.R. Tolkien.|
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Grinnah was a Goblin of Goblin-town in The Hobbit: An Unexpected Journey, who appeared to be a significant member of the Goblin Army, as he directly reports to the Great Goblin when they capture Thorin and Company. He was played by Stephen Ure. When Gandalf arrives to rescue the Dwarves and they take up arms to fight their way out, Grinnah appears to be stabbed to death by Kíli.