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.
The Inquiry will resume on Tuesday at 10am.
Leveson made an order demanding Alastair Campbell's witness statement be removed. The owner of the website, Paul Staines, has been summoned to appear before Leveson on Wednesday to explain how he acquired the document.
Leveson turns his attention to the Guido Fawkes issue for this morning and decides he must give a ruling about the problem.
|@ jamesro47 : Broadcast experience shows proprietors need not fear regulation, Diamond says. Fair point #leveson|
Diamond tells Leveson directly: "It doesn't have to be like this. It's so sad that a handful of journalists have besmirched the press in this way."
Diamond praises collaboration with The Sun over cot death and relationship with tabloid media in general: "We were a force for good... the popular press is nothing to be ashamed of in this country. It can be a force for good."
"There are two sides to the press. I've no doubt they would pursue me now in the same way as in the past."
Diamond wrote a 'supportive' article, congratulating the actress Dawn French about her weight loss. Leveson asks how she makes the judgement about what and who to write about after such press intrusuion into her private life. Diamond's reply is that it does come down to 'a judgement call' , personal values as well as 'taste and decency'.
Diamond says that the broadcast media have to conform to strict guidelines regarding code of conduct without journalism beein negatively affected. She sees no reason why there shouldn't be a similar code for other media.
|@ SkyFixer69 : Other papers then ran spoiler stories that we'd done a deal with the Sun allowing the access to the funeral. #Diamond #Leveson|
Media quickly appeared on Diamond's doorstep when they discovered her son was found dead. One rpeorter had to physically ejected from their house. Diamond had rung her local priest to come over but he had felt too overwhelmed by the press presence that he had left.
Diamond wrote to the editors of every national newspaper, begging them not to stay away form the funeral. All of them did except for one photographer 'with a very long lense'.
|@ rosschawkins : Anne Diamond at #leveson : Sun journo offered her nanny 30k for selling story. Sun then phoned AD and said they'd bought her up|
When Diamond was about to give birth, staff told her they had had to throw a journalist out of the hospital who had been posing as a doctor.
Diamond had a scare in the early stages of her first pregnancy and thought she was going to lose her unborn baby. When contacted the same day by a journalist from the NOTW, she denied she was pregnant. When she confirmed the pregnancy some time later, the paper called her a liar.
Diamond says there were consistent negative stories about her following an encounter with Rupert Murdoch when Diamond asked the media mogul how he could sleep at night when sections of his empire were intent on ruining people's lives.
Anne Diamond 'catapulted' into the public eye when she joined Breakfast TV in 1983. She says that as a journalist she has seen both sides of press activities in terms of writing about others as well as being written about.
Church responds to Paul Dacre comments that newspapers are reporting on the misdeeds of the 'rich, powerful and pompous' by claiming many of these editors are probably rich and powerful (while demurring from adding pompous) and that they could be targets for similar press attention.
Church ends her evidence to Leveson.
"[The PCC] is totally inadequate. They don't deal with the problems, they don't deal with it at all."
Church describes how media reports twisted and distorted comments she made following the 911 attacks and how it led to a huge backlash against her in the United States, so much so that her record company sought protection for her chruch was 15 at the time.
The Daily Mail wrote a story about a holiday she took with a group of girlfriends when when she was 18. The piece was titled "Vice of an angel". Church says it was massively exaggerated.
Church's first boyfriend sold a story about their relationship when she was 17, revealing "intimate sexual details."
|@ rosschawkins : Charlotte Church at #leveson : says she kept friends out of her life for fear they were leaking. In fact her phone was hacked|
|@ benfenton : #Church prefers mags eg Hello! because They do take nice photos and they actually print what you say. Lesser of 2 evils. #leveson|
|@ rosschawkins : Charlotte Church at #leveson : threat to kidnap her was published in News o t Wrld asked paper not to say where she lived. They did anyway|
News of the World article published detailing allegations that her father was having an affair. "I see no public interest in this story except to sell papers." Had a huge effect on her mother and a "massive psychological impact on me".
Church talks about the increase in paparazzi focus on her as she got older between the ages of 16 and 20 and believes the media got hold of the fact that she was pregnant through underhand and possible illegal methods.
Tells Leveson about a 'countdown clock' in The Sun running down to Chuch's 16th birthday with the innuendo of her reaching the age of (sexual) consent. "It made me feel horrible... I was really uncomfortable with it."
Church claims that she was asked to sing at Rupert Murdoch's wedding in New York. She was offered a £100,000 fee or assurances that his media organisations' would look 'favourably' on her.