Princes William and Harry walked behind the coffin with King Charles III and other members of the royal family as they made their way down the parade route.
In 1997, the brothers held a funeral for their mother, Princess Diana, side by side, and both said the moment had a big impact on them.
The coffin was carried on a gun stand. It is adorned with the imperial crown and next to it is a wreath covered with royal flags.
Military personnel surrounded the Queen’s coffin, which was carried to the shopping centre, Whitehall, Parliament Street, Parliament Square and the New Palace yard, before entering Westminster Hall, where Justin Welby, Archbishop of Canterbury, was conducting a brief service .
Welby told CNN that “participating in saying goodbye to Elizabeth” was a “gift.”
Speaking to the crowd on Wednesday to CNN’s Clarissa Ward, the archbishop said it was a huge honor and privilege to be part of the event.
The Queen’s coffin will remain in Westminster Hall at the heart of the British Parliament estate until her funeral on Monday.
From Wednesday night, the public will be able to pass through the coffin, which will be placed on a raised platform or coffin. Thousands of people are expected to line up the streets of the capital, with some likely to spend the night outside to pay their respects.
William and Harry, along with their wives Catherine, Princess of Wales, and Meghan, Duchess of Sussex, made a surprise joint appearance in Windsor on Saturday and were not announced in advance. A source told CNN that William invited the Sussexes to the Walk to view the monument to the Queen and greet well-wishers.
The Queen’s coffin was transported to Edinburgh from Balmoral Castle, where she died, on Sunday. The six-hour route marks the first leg of the late monarch’s eight-day journey to her final resting place.
Mourners line up outside St. Petersburg. It was their turn to pay their last respects at Giles Cathedral in Edinburgh on Monday night. The Scottish government said more than 26,000 people had to apply to the Queen.
The Queen’s coffin was brought in from St. Petersburg on Tuesday. From Giles Cathedral in Edinburgh to Buckingham Palace in London.
It was taken from the cathedral to Edinburgh Airport by a hearse and then flown on a C-17 Globemaster transport aircraft to RAF Northolt Air Force Base in west London.
The coffin was then transported to Buckingham Palace, where it was picked up by the Queen’s family, before staying overnight in the Bow Room.