Author JK Rowling left her fans speculating about a possible return of the boy wizard by dropping hints about 'Harry Potter'.

Rowling told her fans that she was busy working on a novel and "tweaking a screenplay" without giving anything away as to the titles of the projects she's working on.

The author is reportedly working on the screenplay of 'Fantastic Beast and Where to Find Them'.

Rowling followed her update tweet with a cryptic message: "Cry, foe! Run amok! Fa awry! My wand won't tolerate this nonsense."

Re-tweeted thousand times, the riddle has many 'Potter' fans speculating whether there would be more stories from the wizard universe.