Hugh Grant and Jemima Khan must be shown police information which indicates that their telephone messages might have been intercepted by a private investigator working for the press, a High Court judge has ruled.
Mr Justice Vos ordered the Metropolitan Police to disclose information detectives had gathered during inquiries into alleged telephone hacking to the Notting Hill actor and his former girlfriend.
The judge said Hugh and writer Jemima were entitled to see police documentation concerning messages allegedly intercepted by private investigator Glenn Mulcaire and used in articles in "the News of the World and other newspapers".
Lawyers for the pair had asked for the disclosure order during a High Court hearing in London. The application was not opposed by police.
They said police had indicated that they had material which suggested that messages received and sent by Hugh and Jemima might have been intercepted.
Neither Hugh, 50, nor Jemima, 37, daughter of billionaire financier Sir James Goldsmith and ex-wife of former Pakistan cricket star Imran Khan, were at the hearing.
Four years ago Mulcaire and former News of the World royal editor Clive Goodman were given jail terms after the Old Bailey heard how they plotted to hack into royal aides' telephone messages.
New police inquiries have started since then and a number of high-profile figures, including actor Jude Law, television presenter Ulrika Jonsson and ex-footballer Paul Gascoigne, have launched damages claims against News Group Newspapers, publishers of the News of the World.
A civil trial at the High Court is due in January.
In April, Hugh wrote an article in the New Statesman magazine, in which he told how a former News of the World executive told him that his phone had been "hacked".