The big question mark hanging over King Charles' Coronation is whether Prince Harry and Meghan Markle will be there.
It is just a month until the big day at Westminster Abbey and the pair, who live in California, have still not responded to an official invitation.
It is said their non-RSVP has caused a "headache" for organisers of the Coronation, who need to finalise plans for seating, transport and security.
However, one palace aide has said the couple would probably not have been given a strict date to confirm their attendance - unlike some of the other guests who have been invited.
The source told the Daily Mail it was "unlikely" such a date would be imposed on family members.
But they added: "Everything is still up in the air and there's only a month to go.
"All people have been told is that 'it should hopefully be resolved soon'.
"But in the meantime, the teams are trying to finalise plans for 2,000 guests, many of whom are international heads of state and VIPs. It's a headache."
However, if Harry and Meghan do decide to come to the Coronation, there is one part of the big day they won't be involved in - the balcony appearance.
The Mirror has revealed that the King and Queen will celebrate their historic day by appearing on the Buckingham Palace balcony with working royals only.
His Majesty's decision to appear in the historic moment with just his closest and most loyal family members will show his vision of a slimmed-down monarchy, royal sources said.
The roaring finale event on Saturday, May 6, will also include a spectacular flypast over the royal family’s HQ.
Detailed plans seen by The Mirror reveal how the King has chosen to say thanks for the nation alongside a select few royals who have dedicated their lives to public service, while also showing "the heartbeat and future of his family".
The final group of 15 shows there is no place for Harry and Meghan alongside the likes of the Prince and Princess of Wales and their children Prince George, Princess Charlotte and Prince Louis.
Charles's trusted lieutenant and beloved sister, Princess Anne, will be by the King’s side with her husband Vice Admiral Sir Tim Laurence.
The new Duke and Duchess of Edinburgh, Prince Edward and his wife Sophie, who spent so much time with the late Queen in the final years of her life, will also be present.
