JK Rowling reveals spoiler about 'Fantastic Beasts 2'

Author JK Rowling has revealed an important script detail of Fantastic Beasts and Where To Find Them sequel.

In a Twitter conversation with one of her fans, the 51- year-old writer disclosed that Newt Scamander's Patronus is a major spoiler for the second installment of the Harry Potter spin-off.

"Could you please please please tell me which animal is Newt's Patronus? Or is that a spoiler of the next movies?" asked an admirer.

To this Rowling replied, "Big spoiler."

The 2016 film, starring actor Eddie Redmayne as Newt, saw the magi zoologist fight off the Obscurus, a creature similar to the Dementors.

As per Potter trivia, a wizard or witch uses the Patronus charm to defend themselves against the Dementors.