Pennywise is the clown form of the shape-shifting creature at the centre of Stephen King's IT, first published as a novel in 1986 and later adapted for television in 1990 and for film in 2017 and 2019. The character preys on children in the town of Derry, often appearing with a red balloon, and that mix of circus cheerfulness and menace made the clown an enduring horror figure. Short audio clips spread through meme pages, horror edits and Halloween compilations, where a few seconds are enough to signal danger without showing the films themselves.