The sister of late music icon Prince has said the 57-year-old has no known will and has filed paperwork to ask a court to appoint an executor to oversee his fortune. Tyka Nelson filed the paperwork at a Minneapolis court asking to appoint a special administrator for Prince's estate, which includes the Paisley Park Studios where he was found dead on 21 April.

Nelson, the only surviving full sibling of Prince, is reported to have asked Bremer Trust, a corporate trust company, to be named administrator of the 57-year-old's estate. Nelson reported that "immediate action" is needed to deal with Prince's business affairs as he did not leave a will before his death.

"I do not know of the existence of a will and have no reason to believe that the Decedent executed testamentary documents in any form," Nelson said in her petition for the appointment of a special administrator. She listed herself and five other half-siblings of Prince -John Nelson, Norrine Nelson, Sharon Nelson, Alfred Jackson and Omar Baker -as heirs in the petition.

The legendary artist is estimated to have sold more than 100 million albums during his career and is believed to have left around $27m (£18.5m) in property. According to Celebrity Net Worth, Prince is worth around $300m, a figure that would presumably rise following posthumous album sales.

Prince was cremated following a private ceremony at a Minneapolis funeral home within a week of his death, in accordance to his Jehovah's Witness faith.