Who is the title character of American author Stephen King's 1986 horror novel It?

PennywiseIt is the title character of American author Stephen King's 1986 horror novel It. The character is a menacing predatory entity which preys upon the children of Derry, Maine, roughly every 27 years, using a variety of powers that include the ability to shapeshift, manipulate, and go unnoticed by adults. During the course of the story, it primarily appears in the form of Pennywise the Dancing Clown.