Police forces across Ireland and England spent the final days of August knocking down a very specific rumor: that a life-sized version of Dr. Seuss's Cat in the Hat was stalking neighborhoods after dark. The videos and photos, which spread rapidly on TikTok and Facebook under names like the "Cat in the Hat serial killer," were fabricated using artificial intelligence, according to PetaPixel, which traced the clips to AI tools that inserted the costumed character into otherwise real footage of streets and driveways.
The panic appears to have started in Ireland, with sightings reported around Wexford and the seaside village of Curracloe, before spreading to England, including Warrington, the Meadowhall area of South Yorkshire and Birmingham. Police on both sides of the Irish Sea issued statements to head off the alarm; Wexford's force said flatly that "the Cat in the Hat was not in your driveway," while South Yorkshire Police joked that it had received no reports of any such character roaming its patch. Cheshire Police, which covers Warrington, said it had logged no genuine incidents either.
The hoax nonetheless had real consequences. The BBC reported that a 16-year-old girl became "totally freaked out" after watching the videos and asked her mother to collect her early from a sleepover. Fake police statements were also circulated online to lend the story more credibility, further muddying what was and wasn't real for anxious parents and teenagers.
The trend fits a pattern that has become familiar this year: AI-generated "creature" hoaxes, from phantom monkeys reported to police in New Jersey to costumed stalkers filmed on suburban streets, spreading faster than local authorities can debunk them. Reviewers who examined the Cat in the Hat clips, Yahoo News UK reported, found that most had been digitally altered or generated outright, with the costumed figure composited into genuine location footage to make the videos look convincing at a glance.
Even after police statements ran in local papers and on television, new clips kept appearing under the same hashtags, suggesting the joke — or the scare — still had an audience heading into September. No consistent explanation has emerged for who is producing the videos or why, and police in both countries say they are not treating the matter as a criminal investigation.
