'IT: Welcome to Derry' episode 3: Did you spot the Andy Muschietti cameo?

IT: Welcome to Derry is the kind of show you need to pay close attention to when you watch.

Andy Muschietti's IT prequel is packed full of Stephen King Easter eggs, from the clue-filled opening credits to full-blown crossover characters.

Episode 3 is no different, and there's even a brief cameo from Muschietti himself that you may have missed.

Who does Andy Muschietti play in IT: Welcome to Derry episode 3?

Episode 3 starts with a trip back to 1908, where a young boy visits a dusty funfair that comes complete with a "Human Freaks" sideshow. As he walks inside through a hall of mirrors, we hear the jangling sound of piano keys.

A man playing said piano appears with cigarette dangling from his mouth and turns his head to bark a gruff "keep moving!" at the boy, followed by a slightly sinister laugh. This piano player is none other than Andy Muschietti himself.

It's a brief, but fun, appearance, adding nicely to the discordantly creepy sequence which ends with the boy running screaming from the tent after a man with one eye jumps out of the shadows to scare him.

This isn't the first cameo Andy Muschietti has had in the IT universe, either. In IT: Chapter Two, he also pops up as a customer in the pharmacy during a scene with Eddie Kaspbrak (Eddie Ransome).

New episodes of IT: Welcome to Derry premiere Sundays at 9 p.m. ET on HBO and HBO Max.