The Queen has been hailed as a "beacon of womankind" and a "rock of stability" as tributes poured in on the day she is due to become Britain's longest-reigning monarch.
Although the exact time she will achieve the record is not known, but the Palace estimates that Her Majesty will surpass her great-great-grandmother Queen Victoria by a few minutes at around 5.30pm, having reigned for approximately 23,226 days, 16 hours and 30 minutes.
To mark the occasion, a new picture taken by celebrity photographer Mary McCartney - the daughter of former Beatle Sir Paul - has been released.
It shows the head of state sitting at her desk in Buckingham Palace undertaking official business.
Speaking ahead of the "historic moment", David Cameron paid tribute to the monarch for her "extraordinary record" in addition to her "grace and dignity".
Over the last 63 years, Her Majesty has been a rock of stability in a world of constant change and her selfless sense of service and duty has earned admiration not only in Britain, but right across the globe. It is only right that today we should celebrate her extraordinary record, as well as the grace and dignity with which she serves our country.
– David Cameron
There had been speculation that a celebratory private event was planned for today.
However, in keeping with the Queen's business-as-usual approach, Wednesday will be a normal working day for the monarch with no special dinner party, despite the nationwide fanfare.
The Queen is usually taking her traditional summer break at her private Scottish home of Balmoral at this time of year, but will open the new Scottish Borders railway and take a stream train ride with First Minister Nicola Sturgeon to mark its opening.
http://www.itv.com/news/2015-09-09/queen-hailed-as-rock-of-stability-as-she-prepares-to-become-longest-reigning-monarch/Well, she'll likely abdicate soon now. She wanted the record, and she got it.