Here's a rundown of the top stories from today's show:
While it's Rowling's first screenplay for the movie company, she teases fans in a statement saying, "The book is neither a prequel nor a sequel to the series, but an extension of the wizarding world."
She says the film is to be set in New York, 70 years before Harry Potter.
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The Duchess of Cambridge looks stunning as she's out for her first official public appearance since giving birth to Prince George. CNN's Max Foster reports.
The royal couple appeared at a charity event for the Tusk awards for conservation workers in Africa almost eight weeks after becoming parents.
Prince William said, "As you might have gathered, Catherine and I have recently become proud parents of a baby who has a voice to match any lion's roar."
Their appearance Thursday coincided with the Prince's announcement to leave the British military. In the next few weeks, the family will move into a grand new apartment at Kensington Palace.
Be sure to tune in to CNN Sunday, September 15, at 10 p.m. ET for Foster's special "Prince William's Passion: New Father, New Hope'
First Lady Michelle Obama launches a new, seemingly innocuous public health campaign encouraging people to drink more water. But some experts say she's over selling the benefits of H20.
CNN's Elizabeth Cohen reports.
In a new announcement, Mrs. Obama talks about her family's habits and says, "The more water we drank, the better we felt"
But some medical professionals say despite her experience, most Americans are sufficiently hydrated and so an extra glass of water isn't going to increase your energy or make you feel better.
Watch the video and decide if you think this argument holds water.