J.K Rowling, 55, $1 Billion

We don’t think there’s anyone in the world who doesn’t know the Harry Potter film series, adapted from the books by the same name. J.K Rowling, the author of the Harry Potter books, has made a colossal fortune from her literary work, with the books becoming the bestselling book series in history.

The author continues to write and is involved in the film production of her literature. It’s safe to say that Rowling will never be worried about finances anymore. She’s indeed come a long way from a financially struggling single mother trying to get a best-seller out; good for you, Jo!