Prince’s sister, Tyka Nelson, has revealed in court documents that her famous brother did not leave a will.

The documents, filed in state court in Minnesota, show Tyka Nelson has petitioned for a special administrator to oversee Prince’s estate.

Prince Nelson Rogers was found dead in an elevator at his Paisley Park Studios compound in a suburb of Minnesota on April 21 at the age of 57.

The size of Prince’s fortune is unclear but includes $27 million in property.

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Tyka Nelson is Prince’s only surviving full sibling and stated in the papers that immediate action was necessary to manage her brother’s business interests.

Prince is on course to dominate charts this week, as mourning fans rush to buy his music, while the Hollywood Reporter claimed over three million of his songs and albums had been bought in the US since his death.

A private memorial service was held for Prince on April 23, attended by about 20 of his closest friends and family.

Following the service, drummer and frequent Prince’s collaborator Sheila E confirmed there were plans to turn Paisley Park into a museum, akin to Elvis’s Graceland.