The first book in the Potter series -- "Harry Potter and the Philosopher's Stone" (retitled "Harry Potter and the Sorcerer's Stone" in the United States) -- was an overnight bestseller.

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They were series opener Harry Potter and the Philosopher's Stone in 2001, fourth instalment Harry Potter and the Goblet of Fire in 2005 and the fifth entry, Harry Potter and the Order of the Phoenix, in 2007.

BBC: Harry Potter film breaks UK box office records

K. Rowling's eagerly anticipated Pottermore website (www.pottermore.com) is a specially-created limited edition of Reader Wi-Fi (PRS-T1) which includes a voucher that enables Harry Potter fans to download the first Harry Potter eBook title, Harry Potter and the Philosopher's Stone, from Pottermore.

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We've made 'Harry Potter and the Philosopher's Stone' and I thought that was so important.

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Since the first book, Harry Potter and the Philosopher's Stone, was published, the series has taken the world by storm.

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It has been 10 years since the first movie in the series, Harry Potter and the Philosopher's Stone, was released.

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His hardback copy of JK Rowling's Harry Potter and The Philosopher's Stone was one of only 500 published by Bloomsbury in 1997.

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The Proms programme also includes a concert featuring scores from celebrated British films including The Dam Busters, Shakespeare In Love, Bridge Over The River Kwai and Harry Potter and the Philosopher's Stone.

BBC: Last Night at the Proms