Coulrophobia sufferers steer clear.

Viewers are frazzling their brains over this seemingly innocent photograph of a gracefully stretching ballerina — which hides a highly sinister image.

[Warning: Spoilers below]

The illusion has actually been a fixture online for years — but is currently scaring up new viral views amid the optical illusion craze sweeping the web.

On the surface, the elegant black and white photograph, snapped by Austrian photographer Ronnie Boehm, depicts a bird’s eye view of a crouching ballerina with her hands crossed in front of her. However, upon closer inspection, viewers can make out a spine-tingling killer clown visage like Pennywise from “IT.”

Specifically, the dancer’s frilly dress comprises Chuckle’s hair, the dress straps make up its makeup while the spaces between her shoulders and torso act as its sunken eyes. Meanwhile, the harlequin’s nose is made up of the ballerina’s hair bun while it’ mouth is comprised of the shadow cast by the her head and it has a “crossed hand” bowtie. Perhaps it’s no surprise that the composition is titled “Halloween ballerina.”

Still don’t see, well, it? Take a closer look!

The clown-tenance pic isn’t the first hidden image to throw puzzle lovers for a loop. This dirty drawing reveals how sex-obsessed the beholder is based on which image they see first.

Optical illusions such as this are often just a chance to clown around and briefly escape the stresses of modern life — but they also hold actual scientific value for medical professionals. These brain teasers are credited with helping researchers shed light on the complex inner workings of the human mind and how it reacts to its surroundings.

Dr. Gustav Kuhn, a psychologist and human perception expert at Goldsmiths University in London, once declared that illusions are important to our understanding of the brain: “We typically take perception for granted, and rarely think about the hard work that underpins everyday tasks, such as seeing a cup of coffee in front of you.”