A furry interloper has been prowling the hallowed halls of Harvard Law School.

The visitor in question touched off a social media frenzy this week after professor Annette Gordon-Reed alerted Twitter to his presence, marveling at the tabby cat nonchalantly strolling around the school's upper floors.

Gordon-Reed said in an email Thursday that she was surprised by the attention her Tweet generated. It had garnered nearly 400 replies and 2,800 retweets by Thursday, not to mention coverage in the Boston Globe and the Daily Mail (which got it wrong by claiming Remy is a stray.)

“I know people love cats, so I suppose I should not be so surprised,” she wrote. “We're all in the mood for some warmth and/or levity. But what is interesting about the photo is that he seems so much at home, walking casually through the space.”

Remy wasn't skittish or alarmed by her presence and seemed to be on his way somewhere, she added. Gordon-Reed clarified that she had previously spotted Remy outside the law school, but had never before encountered him inside.

According to the Harvard Gazette, four-year-old Remy is owned by Cambridge resident Sarah Watton, and she's well aware of his double life. She gets calls daily from campus by people reporting his presence, which occasionally requires his extraction from university buildings.

This being Twitter, though, people couldn't help but have some fun with Gordon-Reed's Tweet. They offered up a cornucopia of alternative names for the kitty, including Sonia Soto-meow and Purrgood Marshall. Still others pegged Remy as a “purred-year law student.”