An alleged tour contract for Madonna has been leaked as part of a large-scale hack that targeted documents relating to hundreds of celebrities, including Hollywood A-listers.

The law firm Grubman Shire Meiselas & Sacks, which represents some of the world’s highest-profile celebrities, recently confirmed that it was the victim of a security breach.

Stars such as Robert De Niro, Madonna, DrakeNicki MinajMariah Carey, Elton John, U2 and Rod Stewart are among those whose personal information may have been compromised.

A screenshot of a legal document from Madonna’s recent Madame X tour surfaced on the dark web, apparently bearing signatures from an employee and tour company Live Nation.

Another screenshot depicts dozens of computer files bearing the names of celebrities including Bruce Springsteen, Bette Midler and Barbra Streisand.

Reports suggest the hackers claim to have obtained 756 gigabytes of data, which includes contracts, non-disclosure agreements, phone numbers and private emails.

The law firm will be keen to avoid a repeat of 2014, when Sony Entertainment was hacked and thousands of emails relating to Hollywood stars were made public.

The Independent has contacted Madonna’s representative for comment.

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