Britain's King Charles III has welcomed world leaders to Buckingham Palace ahead of the funeral of Queen Elizabeth II.
Earlier, US President Joe Biden paid a final tribute to the late monarch.
President Biden crossed himself and put his hand on his heart while he stood with his wife Jill on a gallery overlooking the flag-draped casket in London's Westminster Hall.
Mr Biden said the queen, who reigned for a record-breaking 70 years until her death on 8 September aged 96, exemplified the "notion of service".
"To all the people of England, all the people of the United Kingdom, our hearts go out to you, and you were fortunate to have had her for 70 years, we all were. The world's better for her," Mr Biden said after signing a book of condolences.
At Buckingham Palace a reception hosted by King Charles for the dozens of world leaders has been taking place.
President Michael D Higgins and Taoiseach Micheál Martin are among those in attendance.
Australia's anti-monarchy Prime Minister Anthony Albanese, who viewed the lying-in-state and met King Charles on Saturday, told Sky News Australia that the queen was "a constant reassuring presence".
There was also a private audience at Buckingham Palace for Prime Minister Jacinda Ardern of New Zealand, which like Australia and 12 other Commonwealth realms now counts King Charles as its sovereign.
"You could see that it meant a huge amount (to Charles) to have seen the sheer scale and outpouring of people's love and affection for her late Majesty," she told BBC television on Sunday.
But in a sign of challenges ahead for the new king, Ardern added that she expected New Zealand to ditch the UK monarchy "over the course of my lifetime".
Members of the public were already camping out in advance to catch a glimpse of Monday's funeral at Westminster Abbey, which is expected to bring London to a standstill and be watched by billions of viewers worldwide.
Queen Elizabeth's state funeral, the first in Britain since the death of her first prime minister Winston Churchill in 1965, will take place Monday at Westminster Abbey at 11am.
Reflecting on the queen's wishes for the hour-long ceremony, the former archbishop of York, John Sentamu, said she "did not want what you call long, boring services".
"The hearts and people's cockles will be warmed," he told BBC television.
Minute of silence
A national minute of silence to remember Queen Elizabeth II was held this evening across the UK, with people encouraged to mark the moment on their doorsteps or at community events and vigils.
People paused at 8pm to remember the longest-serving monarch in British history, with applause following at some events.
British Prime Minister Liz Truss stood outside 10 Downing Street with her head bowed during the national moment of reflection.
Meanwhile, King Charles has thanked the public for the support shown towards Britain's royal family, in a final message before Queen Elizabeth II's state funeral.
"As we all prepare to say our last farewell, I wanted simply to take this opportunity to say thank you to all those countless people who have been such a support and comfort to my family and myself in this time of grief," the king said in a statement from Buckingham Palace.
