JK Rowling has sparked speculation that Harry Potter and the Cursed Child is heading to the big screen after posting a cryptic tweet.

The 54-year-old author hinted that the stage play follow up to her hugely successful franchise is continuing, with further parts to arrive.

Returning to Twitter after a six-month break, Rowling shared a stylised image of villain Lord Voldemort's infamous Dark Mark and added the hashtag #CursedChild.

She captioned the post: "Sometimes, darkness comes from unexpected places."

Harry Potter And The Cursed Child is a stage play and award-winning follow-up to the original series of seven books, and some fans are hoping that a movie is in the pipeline.

Pottermore, dashed fans hopes about a film by tweeting: "There is something exciting coming later on from @CursedChildNYC, but it's not a movie…"

Sarah Jessica Parker kicked off the Times Square takeover of Harry Potter and the Cursed Child, announcing that the stage show will continue with new chapters.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

A post shared by Harry Potter on Stage London (@cursedchildldn) on

"Welcome back to Hogwarts," the teaser wrote, with a yellow background and wizard at the ready.

Harry Potter And The Cursed Child premiered in London's West End in July 2016 and proved to be a huge success. 

The play's story picks up 19 years after the events of Harry Potter and The Deathly Hallows, and features Harry Potter as a senior figure at the Ministry of Magic while his son Albus Severus Potter is set to start at Hogwarts.

Feature image: Instagram/@moviedigger