The King has thanked the nation for the outpouring of support and warmth his family has received.
Charles' praise came as it emerged Prince George and Princess Charlotte will join their parents, the Prince and Princess of Wales, at the Queen's state funeral, mourning their great-grandmother with more than 2,000 others at Westminster Abbey.
A minute's silence was held at 8pm on Sunday, with Prime Minister Liz Truss standing outside Downing Street, as the nation paused to reflect on the eve of Queen's burial. In his message issued by Buckingham Palace, Charles said: "Over the last 10 days, my wife and I have been so deeply touched by the many messages of condolence and support we have received from this country and across the world.
READ MORE: Merseyside falls silent to remember Queen Elizabeth II
"In London, Edinburgh, Hillsborough and Cardiff we were moved beyond measure by everyone who took the trouble to come and pay their respects to the lifelong service of my dear mother, the late Queen. 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."
A previously unseen portrait of the Queen smiling with joy was released by the Palace on the eve of her funeral. The image was taken by photographer Ranald Mackechnie ahead of the Platinum Jubilee celebrations, and shows the monarch beaming brightly at the camera in her Windsor Castle home.
The Duke of York was the last of the Queen's children to pay tribute, with Andrew saying: "Mummy, your love for a son, your compassion, your care, your confidence, I will treasure forever."
Andrew hailed the Queen for her "knowledge and wisdom infinite, with no boundary or containment", adding: "I will miss your insights, advice and humour."
USA President Joe Biden visited Westminster Hall with first lady Jill Biden to pay his respects to the late monarch and after signing a book of condolence at Lancaster House said: "You were fortunate to have had her for 70 years, we all were. The world is better for her."
The King hosted a Buckingham Palace reception on Sunday for world leaders, welcoming around 500 global figures and their partners.
They included the US president and his wife, France's President Emmanuel Macron and his wife, New Zealand Prime Minister Jacinda Ardern and her counterpart from Canada Justin Trudeau and Brazilian President Jair Bolsonaro.
You can light a candle for Queen Elizabeth II here or leave a tribute to her here.
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