A message from a Chicago guy on Twitter has gone viral after a famed author responded back.

Michal Wilczewski, @mehow87 on Twitter, snapped a pic of a chalk-drawn door at the Damen Blue Line stop in Chicago yesterday morning.

He posted the picture on Twitter and asked J.K. Rowling, author of the Harry Potter series, why it was there.

Surprisingly, Rowling responded.

The internet then freaked out.

In case you're as lost as I am, "Ilvermorny is the North American school of witchcraft and wizardry from Rowling's magical Harry Potter universe." according to the Chicago Tribune.

Not entirely sure if I believe Rowling, but I'm a muggle so I probably wouldn't believe the entrance existed if I saw it anyway.

Sweet Lenny is the brand manager of 97ZOK and Operations Manager for Townsquare Media Rockford. Catch him afternoons 3 to 7 on 97ZOK. Follow him on TwitterInstagram and like his page on Facebook.