Britain's King Charles III has led his siblings in a vigil around the coffin of their mother, Queen Elizabeth II, as she lay in state at the UK parliament in London.
Charles, Princess Anne, Prince Andrew and Prince Edward stood silently in full ceremonial military uniform for the 15-minute so-called Vigil of the Princes, as members of the public filed by the casket in Westminster Hall.
Her grandchildren, including princes William and Harry, will also take part in a vigil.
The queen's death has triggered an outpouring of emotion in Britain, with tens of thousands queueing for hours to pay their respects to the late monarch.
A state funeral will take place at Westminster Abbey on Monday morning, with more than 2,000 guests expected.
After the service, the coffin will be transferred by royal hearse to the queen's Windsor Castle home, west London, before a committal service at St George's Chapel attended by many past and present royal staff.
A private burial will follow attended only by members of the royal family in which the queen will be laid to rest alongside her late husband Philip, her parents and sister.
President Michael D Higgins, Taoiseach Micheál Martin, US President Joe Biden, Canadian Prime Minister Justin Trudeau, Australian leader Anthony Albanese and France's Emmanuel Macron are all expected to attend the funeral, as will Japan's Emperor Naruhito and numerous other royals.
"The queen held a unique and timeless position in all our lives," funeral organiser the Duke of Norfolk Edward Fitzalan-Howard, also known as the Earl Marshal, told reporters at a briefing.
"It is our aim and belief that... the next few days will unite people across the globe and resonate with people of all faiths, whilst fulfilling Her Majesty and her family's wishes to pay a fitting tribute to an extraordinary reign," he said.
The queen's coffin has been lying in state at Westminster Hall since Wednesday, and has attracted a seemingly endless stream of mourners.
The casket is draped in the Royal Standard flag, with the Imperial State Crown, her ceremonial Orb and Sceptre on top, with tall, flickering candles at each corner.
Mourners have marked their moment in front of the coffin in various ways, from bows or curtsies to the sign of the cross or by simply removing their hats.
