J.K. Rowling

"Harry Potter and the Deathly Hallows, Part 1" had the most successful opening of the series so far, bringing in $125 million in U.S. box office sales last weekend. That gives the Warner Bros. title the sixth-most successful U.S. movie launch ever.

Will author Rick Riordan reach J.K. Rowling territory? Millions of fans of his 'Percy Jackson' series would answer that question with a resounding yes, but it will take Hollywood's blessing to vault him into that hallowed territory.