Singer Charlotte Church, broadcaster Anne Diamond and the retired teacher wrongly arrested for Joanna Yeates' murder are to give evidence to the Leveson Inquiry.
Church is expected to describe how the News of the World published a story about her father having an affair despite knowing that her mother had just been admitted to hospital after a suicide attempt.
The inquiry into press standards has heard that she also endured media intrusion ranging from journalists installing secret cameras in bushes to photographers trying to open the doors of cars and take pictures up her skirt.
Church will take the stand amid questions over how a political blogger managed to access the evidence of former Number 10 communications chief Alastair Campbell ahead of his own appearance before Lord Justice Leveson.
Papers submitted to the inquiry by Mr Campbell were obtained by Paul Staines, who blogs under the name Guido Fawkes, and published online on Sunday afternoon. They detailed the former spin doctor's belief that a story revealing Cherie Blair's pregnancy printed by the Daily Mirror in 1999 could have been obtained by phone hacking.
Mr Staines, who claimed to have accessed the papers "by legal means", has now been summoned to give evidence to the inquiry.
During the hearing, Ms Diamond will recount her belief that parts of the press waged a vendetta against her for nearly two decades after she asked Rupert Murdoch what he thought about "the fact that his newspapers ruined people's lives".
Former teacher Christopher Jefferies will tell the inquiry that certain papers destroyed his reputation after police wrongly arrested him on suspicion of the murder of landscape architect Joanna Yeates in Bristol in December last year.
Lord Justice Leveson will also hear evidence today from former British Army intelligence officer Ian Hurst and Northern Ireland human rights campaigner Jane Winter. They claim their email correspondence was illegally accessed by private investigators working for the News of the World.
While he will not be addressing the probe into press standards until Wednesday, Mr Campbell will see his evidence published on the Leveson Inquiry's official website before his appearance.