Not just John, but Henry to cameo in The Fault in Our Stars movie!!!

Maureen Johnson is the #1 New York Times and USA Today bestselling author of several YA novels, including 13 Little Blue Envelopes, Suite Scarlett, The Name of the Star, and Truly Devious. She has also done collaborative works, such as Let It Snow with John Green and Lauren Myracle (now on Netflix), and several works in the Shadowhunter universe with Cassandra Clare.