J.K. Rowling has completed her third novel as Robert Galbraith and has posted several tweets as an attempt to congratulate herself.

Titled 'Career of Evil', the upcoming book will hit bookstores this autumn, as stated by publisher Little, Brown.

On Twitter, the award-winning author went back and forth in a conversation that she initiated using her own account as well as that of Galbraith's.

Rowling congratulated herself first by posting a tweet that said: "Very pleased for you, Robert."

 

Galbraith has previously written two novels, both of which are being adapted into a BBC One series. The first novel titled 'The Cuckoo's Calling' earned a spot in several bestseller lists without readers knowing who had actually written the book.

It follows the story of a war veteran who becomes a private investigator and examines the mysterious death of a model who fell from a balcony.

"Being Robert Galbraith has been such a liberating experience," Rowling shared. "It has been wonderful to publish without hype and expectation and pure pleasure to get feedback under a different name."

Meanwhile, in her appearance on NBC's "Today" show earlier this month, Rowling was asked whether there is an opportunity to come up with an eighth installment in the "Harry Potter" series.

"I have always said, never say never," she explained "I've always said I'm not going to say 'I definitely won't' because I don't see why I should say that. You know, it's my world and I might choose to step back into it."

However, stepping back into such world means penning the script for the upcoming movie adaptation for 'Fantastic Beasts and Where to Find Them.' Moreover, Rowling already confirmed that Potter fans should not look forward to any updates on Harry, Ron or Hermione soon, saying: "I don't think that's going to happen."

Nonetheless, 'Fantastic Beasts' will be created into a trilogy and will feature the creatures from the 'Harry Potter' series', although it remains unconfirmed whether certain known wizards will make an appearance in the movies.

These films will follow the story of Newt Scamander and his adventures while out in the wild. Although certain elements of the trilogy may be easily recognized by Potter fans, it is important to note that 'Fantastic Beasts' takes place seven decades before the story that is being followed in the 'Harry Potter' series.

'Fantastic Beasts and Where to Find Them' has been set to open in cinemas in November 2016.