Exclusive Sneak Peek: Inside J.K. Rowling's Secret Struggles

On the journey from a penniless single mother to the world's first billionaire author, Harry Potter has been J.K. Rowling's constant companion for 17 years. Now, new secrets behind the series have been revealed!

In JK Rowling: Behind Closed Doors, meet the woman who created the $25 billion Harry Potter franchise — and inspired a generation to read.

But it wasn't always easy. After the series ended, Rowling was under utmost pressure for her next work.

Natalie Morales hosts as we find out what inspired the books and their secrets.

J.K. Rowling Behind Closed Doors airs Wednesday at 9ET/8PT on Reelz.