Begin by drawing a large circle for the clown's face. Add two vertical lines under the circle for the nose and mouth.
Draw two circles inside the face for the eyes, being careful to make them even in size. Inside each circle, draw a smaller circle for the iris and a tiny circle for the pupil.
IT's hair is one of his most defining features, so make sure to add plenty of it! Start by drawing a large poof of hair at the top of the head that curves downward.
Add sharp teeth inside the mouth, making sure they look menacing and scary.
For IT's clothes, draw a collar around the neck and two circles for the buttons on the shirt. Next, draw the sleeves on the shirt with long, curved lines.