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31 March 2012, 06:00 | Updated: 31 March 2012, 13:18
Thousands of Harry Potter fans will turn out today at the opening of the studios where the blockbuster film series was shot.
Stars including Rupert Grint, Tom Felton and Bonnie Wright will also attend the multi-million-pound Warner Brothers Studio Tour - The Making of Harry Potter.
Studio bosses described the attraction, at Leavesden, near Watford, where all eight films were made, as the "ultimate opportunity" for fans of JK Rowling's magical stories to enter the sets of their favourite movies.
The three-hour walking tour's attractions include the original Great Hall of Hogwarts School, built for Harry Potter and the Philosopher's Stone.
The hall features graffiti by Hogwarts' pupils, solid oak and pine house tables which were built for the films, and York stone flooring laid more than 11 years ago.
Some of the most recognisable sets include Dumbledore's office, Diagon Alley, the Ministry of Magic, 4 Privet Drive, Gryffindor common room and the Weasley kitchen.