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J.K. Rowling has penned a letter in Dumbledore voice to Cassidy Stay, a teenager who survived a mass murder of her family on July 9 in Houston. According to a Facebook post which was created by her supporters, the "Harry Potter" author sent a letter which was written using purple ink to Stay.

In addition to the letter, Rowling gave Stay a signed copy of the third Harry Potter book, "Harry Potter and the Prisoner of Azkaban". Stay also received an acceptance letter to Hogwarts with the school supply list and a wand.

A spokesperson for the British author has confirmed to U.K.'s The Telegraph that Rowling indeed sent a letter to Stay. "We can confirm that JK Rowling was in touch with Cassidy Stay, however, the contents of the letter remain private," the spokesperson said. When asked about a possible meeting in a near future, the rep said, "We wouldn't comment on that but [Cassidy's] is a remarkable story."

Cassidy is the only one in her family who is alive after a gunman killed her parents, two sisters and two brothers. People were moved when the teenager quoted Harry Potter's headmaster Albus Dumbledore during the memorial service, saying, "Happiness can be found even in the darkest times if one only remembers to turn on the light."

"I'm feeling a lot better and I'm on a very straightforward path to a full recovery," she said three days after the killing. "I know that my mom, dad, Bryan, Emily, Becca, and Zach are in a much better place and that I'll be able to see them again one day. Stay Strong."