Stephen king's greatest creation, Pennywise, is not actually a real clown. It is a malvolient entity that takes the shape of the thing you are most afraid of.
Humans cannot comprehend it's true form and anybody who has ever seen it has gone mad. Pennywise is actually a female, but preferes the shape of a male clown, because it attracts foolish children that eventually become the monster's food
Pennywise is the greates character ever created by Stephen King