Jk Rowling has revealed she’s begun working on her first children’s book since the Harry Potter franchise. In her first major interview in years the author opened up to BBC Radio 2's Simon Mayo on his Drivetime show and also revealed she fears she’ll die before getting all her stories published.

JK Rowling has begun writing a new children’s book.

"I sometimes genuinely worry that I'll die before writing them all out. That's my mid-life crisis, that I'll leave this earth without having written them all,” Rowling said. "I have plans to write novels - in the plural - as JK Rowling again but I'm not going to give you an absolute date because things are busy enough.”

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"I have an idea for a children's book, which I really love - I've been writing part of a children's book so I'm going to finish that - and I have ideas for other adult books.” Speaking about her Cormoran Strike series of novels, which she penned under the name Robert Galbraith, Rowling added: "What's nice about the Strike books is I don't have an end point. I'm not as prescriptive as with the Potter books.”

"I could even probably go to 10, even beyond, I don't know, depending on the number of plots. What will ultimately limit it is the relationship between Striker and Robin (Ellacott, his investigator partner), and that's the through-line. I think at the point where I don't enjoy writing about them any more, that will probably be the point when Robert stops writing this series but I certainly am nowhere near that yet."

When asked about the upcoming Harry Potter And The Cursed Child play which opens in the West End in June next year, Rowling said the story was always intended as a play and not a novel. "It is really exciting. I personally had no particular desire to write it as a novel, for reasons that will become clear when people see the play,” Rowling said.

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The play is set 19 years after the last Harry Potter book and focuses on Potter’s youngest son Albus. ”This play would never have happened if this particular team had never come to me,” the author added. “They're extraordinary, and together we're going to make a fantastic experience for people. I didn't go looking for this, this found me."