It was the day the world bid a final farewell to Queen Elizabeth - the end of an era - and a moment that was history in the making.
While the state funeral took place in Westminster Abbey in London, all four corners of the nation paid tribute to the Queen - each in their own unique way.
We take a look at how the UK paid their respects to the Queen Elizabeth II.
After ten days of mourning following the Queen's death, the state funeral - with the pomp and glory to reflect the traditions and pageantry of a royal family whose lineage stretches back almost 1,000 years - was held in Westminster Abbey at 11am on Monday.
In honour of the event, shops were shut, schools were closed and people were given the day off work.
Tens of thousands of mourners streamed into the capital to pay their respects, and 2000 guests comprising of high-profile figures including royalty, world leaders, politicians and royal staff attended the 55-minute service.
A procession then travelled to Wellington Arch at Hyde Park Corner, before heading to Windsor for a private committal service in St George's Chapel.
Some members of the public had camped out for days to secure a prime spot on The Mall to view the Queen's coffin as it passed. All public viewing areas for the funeral procession in the capital were full by just after 9am.
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Large screens to watch the day's ceremony and processions were set up across the country, at landmark venues including Hyde Park in London - which attracted tens of thousands of mourners - and Cathedral Square in Sheffield, Centenary Square in Birmingham, Bitts Park in Carlisle, Coventry Cathedral in the West Midlands and Millennium Square in Leeds.
Screens were also erected along the Long Walk in Windsor, with crowds of people stretching back along the entirety of the three-mile avenue. Some had camped overnight to secure their spot.
Later in the afternoon the state hearse travelled along the same route to St George's Chapel for the committal service, led by a dismounted attachment of the Household Cavalry, with pipers and drums and a band from the Coldstream Guards. The route was lined by members of the Armed Forces.
Along with members of the public, news crews from around the world flocked to key royal points across the UK, a reminder that today's historic events aren't just for the UK, but for billions of people around the globe too.
Scotland came to a standstill, and as in England, schools, colleges, universities and shops were closed as a mark of respect.
More than 1,000 people gathered in the sun at the foot of Edinburgh's Salisbury Crags to watch the funeral on a big screen next to the Palace of Holyroodhouse, the monarch's official residence in Scotland.
Floral tributes lined the streets of Edinburgh.
The Royal Yacht Britannia, which is now a visitor attraction moored in Leith, marked the funeral of the late monarch by flying its flag at half-mast and a piper onboard played a lament.
The Queen died at her Balmoral estate in Aberdeenshire, a place known to have been one of her favourite places to spend time. She always had a particular affection for Scotland, and thousands of Scots have paid their respects to her during the period of national mourning.
Last Monday, the Queen's coffin travelled to the Palace of Holyroodhouse, before King Charles led the procession up the city's Royal Mile to St Giles' Cathedral.
Scotland's First Minister Nicola Sturgeon attended the Queen's funeral in London.
With no big screen showings of the funeral or large-scale events organised in Wales, it was up to individuals to gather together in pubs, community centres and churches to watch the ceremony and procession together'.
Cinemas in Colwyn Bay, Tywyn, Swansea, Merthyr Tydfil, Cardiff, Cwmbran, Carmarthen and Rhyl all showed the event.
Penparcau community hub in Ceredigion opened for older people to come together to watch the funeral, while some watching the funeral at churches sang hymns to mark the solemn occasion.
St John the Evangelist's Church in Cardiff, St Mike's in Aberystwyth and St John the Evangelist's Church in the Canton all screened the event for their congregations.
People in Aberfan paid their respects to the Queen, with Gaynor Madgwick telling Sky News correspondent Dan Whitehead: "It's that compelling feeling of emotion that overwhelmed me today to be honest, to say a final goodbye to our Queen, personally and for our community".
Ms Madgwick was just eight when a colliery spoil tip collapsed above her primary school while she was inside.
She also laid flowers beside a tree planted by Her Majesty at the site of the school, now a garden of remembrance saying: "That moment, it was just so silent in the memorial garden. That moment gave me time to reflect. It does take you back. It broke me today. She's gone. It's a final farewell."
The Queen first visited Aberfan in south Wales in 1966 after a mining disaster, which killed 116 children and 28 adults. She later said the eight-day delay of her visit was one of her greatest regrets. The Queen would return to the small mining town four more times.
Crowds gathered in houses, parks and civic buildings across Northern Ireland to watch the Queen's funeral on large screens, with hundreds flocking to Belfast City Hall and around 200 people coming to the front lawn at St Malachy's church in Hillsborough.
Coleraine Town Hall aired proceedings from 8am, while the People's Park in Ballymena and Shaftesbury Park in Carrickfergus streamed the event from 9.30am.
At a screening in Christ Church Presbyterian Church in Dundonald on the outskirts of Belfast, copies of the order of service were handed out on arrival with tea and biscuits also offered to those who came together to watch the historic event.
Ahead of the funeral, a remembrance service was held for the Queen at Hillsborough Fort in Northern Ireland, with a minute's silence observed in her honour.
Piles of flowers and wreaths were left outside Hillsborough Castle in County Down - the royal residence in Northern Ireland - many with touching personal messages to the late monarch. At least 20,000 people have come to pay their respects at the castle over the last 24 hours.
Irish President Michael D Higgins was in London for the funeral.