HBO's 'Harry Potter' special reveals intense casting process for series debut

HBO's 'Harry Potter' behind-the-scenes special, released on April 5, showcases the rigorous casting process for the upcoming series. Casting directors reviewed over 40,000 auditions to select the new Harry, Ron, and Hermione, with the series set to debut on Christmas Day. The documentary also highlights life-like animatronics and a 1991-set wardrobe.

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