Prince Andrew is to speak publicly for the first time today since underage sex claims were made against him.
The Duke of York is expected to give a speech at the World Economic Forum in Switzerland.
A Buckingham Palace spokesman said: "We would not comment on speculation about what the Duke might say."
During his visit to the mountain village of Davos, Andrew will also attend panel debates and meetings as he has done in previous years.
Virginia Roberts has claimed in court papers that the Duke had sex with her on three separate occasions when she was 17, which is underage in the US.
The American woman who says she had sex with Prince Andrew when she was 17 has revealed more details about what she claims happened.
In new court papers filed in the US tonight, Virginia Roberts says she's angry about Buckingham Palace's denials which she says are "false and hurtful to me".
Ms Roberts alleges she was forced to have sex with the Duke of York between 1999 and 2002 in London, New York and on a private Caribbean island owned by the American billionaire Jeffrey Epstein.
The Duke vehemently denies the claims.
The timing couldn't really be worse.
Prince Andrew is due here in Switzerland tomorrow, he's hosting a reception, we expect him to make a speech, there's even been speculation that he might make a personal denial of these earlier allegations.
They've been made by a woman identified in court papers only as Jane Doe Number Three - we know her as Virginia Roberts.
She's been photographed with Prince Andrew, a picture that was taken when she was a 17-year-old. She says in her court declaration: "I knew he was a member of the British Royal Family but I just called him Andy."
The timing of this follows a very strong denial from Buckingham Palace and the woman who's making the accusation has responded to that very forcefully herself.
Buckingham Palace for their part are not saying anything more than their earlier denial tonight.
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Kensington Palace, the official residence of the Duke and Duchess of Cambridge, has launched its own Twitter feed.
Giving few clues of what to expect in the future, the palace tweeted:
Hello from Kensington Palace! Welcome to our new Twitter account.
This account represents The Duke and Duchess of Cambridge and Prince Harry - follow for updates on their work and the #RoyalFoundation
The new account joins @BritishMonarchy for news relating to Buckingham Palace and the Royal Family, and @ClarenceHouse representing the Prince of Wales and Duchess of Cornwall.
It gained almost 4,000 followers in its first half hour of existence.
Sarah Ferguson has made a steadfast defence of her former husband Prince Andrew over claims he slept with a woman when she was underage.
Ms Ferguson told NBC News her former husband was a "humungously good man" and she would not "stand by and let him have his character defamed".
"The American people know my integrity and my integrity is of a great man, and I'll have not one word said about him on any level," she added.
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It has been a bitter back and forth between prominent US lawyer Alan Dershowitz and a woman who claims she slept with him when she was underage.
Mr Dershowitz is suing for defamation and wants the woman's lawyers disbarred.
Now the lawyers have themselves launched a counter-claim for defamation against Mr Dershowitz.
Prince Andrew, who is also mentioned in a civil case in Florida, has said allegations he had sex with a woman when she was underage are "false and without any foundation".
ITV News Correspondent Lewis Vaughan-Jones reports.
Robert Maxwell's daughter, Ghislaine, who is embroiled in the underage sex allegations involving Prince Andrew has refused to comment on the scandal after being questioned by ITV News.
A lawyer who represented several women who made claims against disgraced financier Jeffrey Epstein has told ITV News Prince Andrew should explain "why he's friends with this type of a man."
"It certainly doesn't look very good for someone of Prince Andrew's notoriety to be socialising with a convicted sexual predator," Florida lawyer Spencer Kuvin said.
"It just does not look good. It's salacious, it's unfortunate and people should be questioning just exactly the extent of that relationship and he should be answering for why he's friends with this type of a man."
"These influential and powerful people should have to answer these types of questions just like anyone else should," Kuvin added.
The Duke of York has denied allegations he had sex with a woman when she was underage, calling the claims "false and without any foundation".