JK Rowling at Fantastic Beasts premiere: 'It was an accident'

Harry Potter author JK Rowling has been talking about her new film Fantastic Beasts And Where To Find Them at the movie's London premiere.

She told the BBC's Lizo Mzimba that the new series of films had been a "bit of an accident".

And approaching the 20th anniversary of the first Harry Potter book, she said she felt like "the most fortunate person in the world".