Patrick Ness—who wrote both the book and the screenplay for A Monster Calls and created the short-lived Doctor Who spin-off, Class—is set to pen the script. Reports are pretty light on story details other than the fact Dinklage would play the title character of the Grimm fairy tale, which, in classic Grimm fashion, is far more disturbing than any children’s story has the right to be. The German yarn revolves around a girl locked in a tower by a king who gives the order to spin straw into gold or lose her head by the morning. Enter rambunctious little a-hole Rumpelstiltskin, who offers to spin the straw into gold in exchange for the girl’s necklace. Things escalate into more extreme trades from there, until the girl promises her first born child. Just your classic, horrifying imp creature fairy tale.