Trivia: Director Andy Muschietti has a cameo as a customer at the pharmacy where Eddie picks up his prescription.
Trivia: The heavyset man speaking at the architects' meeting - the first one we see in this scene and who viewers might at first think is the adult Ben Hanscom, before realizing Ben is skyping in to the meeting - is Brandon Crane, the actor who played the young Ben Hanscom in the 1990 TV miniseries version of IT.
Trivia: Pennywise appears for only 10 minutes in the entire film.
Trivia: In order to show that Eddie has severe hang-ups about his relationship with his mother, both his mother (in flashbacks) and his wife (briefly seen in the opening) are played by the same actress, Molly Atkinson, albeit in significantly different makeup and wardrobe to make it subtler.
Trivia: Bill Skarsgård has a lazy eye that he was able to train himself to focus in the same direction as his other eye. Thus, when Pennywise's eyes look in different directions, it's not an effect... Skarsgård is just letting his lazy eye naturally drift. His co-star Billy Hader didn't realise this and asked Skarsgård how the effect of his eyes focusing in different directions was achieved, assuming it was CGI. Skarsgård replied, "Oh, you mean this?" and let his drift sideways, horrifying Hader.
Answer: Pennywise eats Adrian Mellon because he has just awoken from his sleep and is hungry. Pennywise will feed on anyone but prefers his victims to be afraid because the meal is more satisfying. It is described in the book as like "salting the meat." Likewise, Pennywise prefers children because their fear is more intense.
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