While her philanthropy may mean she fell of Forbes' list of billionaires, in 2015 alone J.K. Rowling still boasted an impressive $825 million (£570M) fortune, according to the Sunday Times Rich List. But since the release of Fantastic Beasts and Where to Find Them, Rowling's fortune is expected to have increased dramatically, raking in generous box office takings, as well earnings from other post-Potter works.