The Queen's royal staff have reportedly been called from across the UK to an emergency meeting at Buckingham Palace.
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However, it is believed that meeting has been delayed another two hours and will be held in London at 10am (7pm AEST).
The news, from "sources", has sent the internet into meltdown as the monarch's aides and team members from as far as Balmoral in Scotland to her Sandringham Estate in Norfolk and Windsor Castle head to the city residence.
The BBC reported the meeting was not believed to be a cause for concern and such meetings happened about once a year. BBC royal correspondent Peter Hunt said he understood the meeting was not about the health of the Queen or the Duke of Edinburgh.
According to the Daily Mail, the staff will be addressed by the most senior officer of the royal household, Lord Chamberlain, and the Queen's private secretary, Sir Christopher Geidt.
UK radio is reporting, and social media is speculating, the news could be regarding her husband Prince Philip.
The 95-year-old was on public duty just yesterday opening a new multimillion-dollar grandstand at Lord's, named after former England captain Sir Pelham Warner.
Unlike the Queen, Philip's death with have no constitutional implications. Prince Edward, Earl of Wessex, the couple's youngest child, will inherit his title.
Buckingham Palace has yet to comment on the meeting or release a statement.
Official statements from the palace are usually made at 8am.
Media have now begun gathering at the gates of the palace.
