Fans of Harry Potter are given the exclusive opportunity to win a walk-on part in the teenage wizard's next film, BBC reported Friday.

The winner have to give right answers to questions, related to JK Rowling's best-selling book that will be posted on the MSN website every week until 20 December.

The champion at the competition will appear in forthcoming blockbuster "Harry Potter And The Half-Blood Prince", which is due for release at the end of the next year.

"Needless to say, we expect this to be a highly contested competition," A MSN representative said.

The contest is open to the site's UK users.

"Harry Potter And The Half-Blood Prince" is the sixth instalment in Rowling's hugely popular series.

Daniel Radcliffe will star once again as the schoolboy wizard, alongside Emma Watson and Rupert Grint, who play Hermione and Ron.

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