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© Alanpix.comBirthday boy: WikiLeaks founder Julian Assange today near his home in Norfolk
WikiLeaks founder Julian Assange is celebrating his 40th birthday - just two days before he fights attempts to extradite him to Sweden to face rape charges.

Among those said to be invited to the bash are Brad Pitt and Angelina Jolie and US Vogue editor Anna Wintour.

A huge marquee has been put up at Ellingham Hall, the 10-bed Norfolk farmhouse where he has been under house arrest for the past seven months.

Party invitations included instructions on where to land helicopters and private jets.

Assange has to report to the police station every day as well as wear an electronic tag

If he loses his extradition appeal in the High Court on Tuesday he faces being taken under police guard to Sweden, to fight allegations of rape and sexual assault.

The house and its 650-acre estate are owned by Vaughan Smith, director of the Frontline media club.

Mr Smith, who will be at the party, told the Independent: 'You're only 40 once.' Last week it emerged a £850,000 book deal Assange signed to write his memoirs had collapsed.

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© ReutersHollywood A-listers: Angelina Jolie and Brad Pitt have been invited to the 40th birthday bash
WikiLeaks Versus the World: My Story had been due to be published as part of a lucrative deal with Canongate and Alfred A Knopf.

But fears that the US government could use the details against him, forced Assange to abandon the book.

In another blow, Visa has now closed a donation channel to WikiLeaks after a payment processor briefly accepted money transfers to the site.

Visa and MasterCard were two of several financial and Internet service companies that severed ties to WikiLeaks following its disclosure of thousands of confidential U.S. documents.

Assange has claimed the seven-month-long blockade has cost his online group millions.

A company spokesman said: 'As soon as this came to our attention, action was taken with the suspension of Visa payment acceptance to the site remaining in place.'