King Charles III and Queen Camilla have been crowned at Westminster Abbey
Despite the wet weather, hundreds of thousands of people around the UK celebrated the coronation, as ITV News Political Correspondent Romilly Weeks reports
The King and Queen have been crowned with St Edward's Crown by the Archbishop of Canterbury in Westminster Abbey.
Concentration showed on the King's face as the ceremony approached the crowning and Charles looked emotional ahead of the key moment.
The last time the country marked a monarch's coronation was in 1953, when the late Elizabeth II was crowned Queen.
The King has become the 40th monarch to be crowned at Westminster Abbey, the nation's coronation church, since William the Conqueror was anointed monarch within its walls on Christmas Day 1066.
The event brought together around 100 heads of state, kings and queens from across the globe, celebrities, everyday heroes and family and friends of the couple.
Global popstars Lionel Riche and Katy Perry were part of the 2,300-strong congregation, as was French President Emmanuel Macron, actresses Dame Judi Dench and Oscar-winner Dame Emma Thompson, presenters Ant and Dec and King Willem-Alexander and Queen Maxima of the Netherlands.
Pomp and pageantry were to the fore, with the Armed Forces staging the biggest ceremonial military operation since Queen Elizabeth's 1953 coronation, culminating in a 4,000-strong coronation procession of servicemen and women from across the globe, that wound its way through the heart of the capital.
Future kings, the Prince of Wales and his son Prince George, both played a role in the coronation, while Prince Louis - who turned five a few weeks ago - lightened the mood as he yawned and fidgeted during the ceremony.
ITV News Reporter Sejal Karia spoke to some of those lucky enough to have a ringside seat at the King's coronation
The Princess of Wales stepped out in regal robes at the coronation, wearing a deep blue Royal Victorian Order mantle edged in scarlet over an Alexander McQueen embroidered ivory silk crepe dress.
Her silver bullion, crystal and silver thread work three-dimensional leaf embroidery headpiece was by Jess Collett x Alexander McQueen.
Eight-year-old Princess Charlotte also wore an Alexander McQueen dress - with a cape - in ivory silk crepe.
Meanwhile, Prince Louis, five, was smartly decked out in a Hainsworth Garter Blue Doeskin Tunic with specially designed lace work embellishment to the collar, cuffs and fronts, made by bespoke Savile Row tailors Dege and Skinner.
The historic moment came a few minutes past midday, when the Archbishop of Canterbury Justin Welby placed St Edward's Crown on Charles' head.
The coronation was a spiritual and deeply personal event for the King, a "committed Anglican Christian", who was anointed, seen kneeling at the abbey's high altar and received homage from his son and heir, the Prince of Wales.
William's interaction with his father, where he touched St Edward’s Crown then kissed the King on the right cheek, appeared a poignant moment for the head of state.
As William knelt before Charles, who held his son's hand between his palms, the future monarch said: "I, William, Prince of Wales, pledge my loyalty to you and faith and truth I will bear unto you, as your liege man of life and limb. So help me God."
Watch a full round-up of ITV's coverage of the King's coronation
The Duke of Sussex was among the congragtaion and was seated in the third row, two rows behind William.
Charles delivered a King's Prayer, the first time a monarch has spoken words to God aloud during a coronation, and he prayed to be a "blessing” to people of “every faith and conviction".
In his sermon the archbishop told the nation’s new monarch "we crown a King to serve".
Mr Welby spoke of how "Jesus Christ was anointed not to be served, but to serve" - adding: "The weight of the task given you today, Your Majesties, is only bearable by the spirit of God."
Prince Louis gives a little wave ahead of the coronation
The ceremony had five main elements: the Recognition; the Oath; the Anointing; the Investiture and Crowning; and the Enthronement and Homage, as well as the Queen's coronation.
Prime Minister Rishi Sunak played an active role in the service, reading The Epistle - Colossians 1: 9-17 to the congregation.
Lambeth Palace said that although Mr Sunak is a Hindu, he is reading as prime minister so there is no issue over his personal faith during the Anglican service.
Tracing it roots back to the medieval period the Christian ceremony saw the King dressed in a series of garments signifying a symbolic journey which concluded with him anointed with holy oil during its most sacred moment and crowned.
The newly crowned King and Queen smiled at the thousands lining the streets as they were carried in the Gold State Coach back to Buckingham Palace.
The Princess Royal followed behind on horseback in her role as Gold Stick and Colonel The Blues and Royals (Royal Horse Guards and 1S Dragoons).
Next came the carriage with the Prince and Princess of Wales inside, along with their children Prince George, Princess Charlotte and Prince Louis. Five-year-old Louis waved eagerly from the window.
The King and Queen later appeared on the West Terrace of Buckingham Palace before personnel gave a royal salute.
ITV News Correspondent John Ray heard the reaction of different groups of people from all across the UK to celebrations marking the King's coronation
The King and Queen were joined by other members of the royal family to view a military flypast over The Mall in Central London that signalled the end of the day’s proceedings.
The Prince and Princess of Wales and their children Prince George, Princess Charlotte and Prince Louis joined the monarch as did the pages of honour.
Members of the public were seen running to gather in front of Buckingham Palace to get a glimpse of the royal family on the balcony.
The rain poured heavily but the crowds appeared jubilant as they clamoured to get a coveted spot in front of the palace.
The public started chanting "God Save The King" and gave three cheers as the royal family emerged on the balcony.
Originally intended to be made up of more than 60 aircraft from the Royal Navy, British Army and Royal Air Force, the flypast was scaled down to include only helicopters and the Red Arrows due to the poor weather.
Many members of the family looked up and pointed at the aircraft while the King and Queen looked ahead to ensure nothing happened to their crowns.
The flypast lasted for two minutes and thirty seconds rather than the scheduled six minutes.
The King, Queen and members of the royal family appeared on the Buckingham Palace balcony to watch the coronation flypast
Despite the wet weather, thousands turned out in the capital to celebrate the coronation weekend, with events also planned across the country.
Members of the public sitting in a grandstand in front of Buckingham Palace erupted into cheers after an announcement saying "coronation day is here".
The stand had around 3,800 seats to host veterans, NHS staff, social care workers and representatives of charitable organisations with links to the royal family.
Some 400 young people representing charities watched the coronation service and procession from the adjacent St Margaret's Church.
People attending the coronation service began filing into Westminster Abbey at just after 7.30am.
Dozens poured into the church wearing suits, fascinators, military uniforms and medals, and religious clothing.
Inside the Abbey, the church buzzed with noise as the congregation filed in and took their seats hours before the ceremony was due to start.
A rich royal blue carpet - chosen to highlight the regal red, gold, and purple robes of the king and queen - adorned the dais in the coronation theatre.
There were 2,200 guests invited to sit inside Westminster Abbey to witness the historic moment.
TV presenters Anthony McPartlin and Declan Donnelly joined other celebrity guests including Dame Emma Thompson, Lord Lloyd-Webber, Dame Judi Dench, and Stephen Fry at the service.
Wearing morning suits, Ant and Dec grinned and said hello as some members of the congregation in the North Transept gave them a cheer.
US singer Katy Perry, Australian musician Nick Cave, British Vogue’s editor-in-chief Edward Enninful, actress Dame Joanna Lumley, TV host Jay Blades and singer Lionel Richie, who will perform at the coronation concert on Sunday, were also in attendance.
Actor Stephen Fry, singer Nick Cave, and actress Dame Emma Thompson enter Westminster Abbey
Spice Girl Melanie Brown also spoke to ITV outside the abbey before the ceremony, and recounted the girl group's famous encounter with Charles in 1997.
She said: "I think because we were all so excited on the day we all just kind of freaked out a bit, and broke protocol, and I gave him a kiss and then Geri gave him a kiss and pinched his bum… we were just overwhelmed with excitedness.
"I don't think I'd do that again though… we were all just too excited."
The royal couple spent the night before their coronation dining together privately at Clarence House.
TV presenters Ant McPartlin and Declan Donnelly arrive at Westminster Abbey for the coronation
The pair stayed at their much-loved London base, rather than at monarchy HQ Buckingham Palace, as they prepared for the historic task ahead of them.
The crowds lining The Mall caught their first glimpse of the King as he left St James's Palace in the state limousine to Buckingham Palace ahead the procession to Westminster Abbey.
Crowds in The Mall cheered as they caught sight of Charles and Camilla.
The Duke of York was also seen being driven down The Mall in a state car, with parts of the crowd booing as he went past.
Singer Lionel Richie, actress Joanna Lumley, and Andrew Lloyld-Webber, who has written a coronation march for the occasion, enter Westminster Abbey
Buckingham Palace had earlier said Andrew and his nephew the Duke of Sussex would not have any formal role at the event as they are no longer working royals.
Away from the pageantry the Met Police were heavily criticised over the "incredibly alarming" arrests of Republican protesters ahead of the coronation.
Campaign groups said Saturday's arrests, including that of the chief executive of anti-monarchy group Republic, were "something you would expect to see in Moscow, not London".
First Lady Jill Biden enters Westminster Abbey to represent the US while President Joe Biden stayed at home
The force said 52 people had been arrested for affray, public order offences, breach of the peace and conspiracy to cause a public nuisance around the coronation.
Metropolitan Police Commander Karen Findlay acknowledged concerns about the arrest of protesters but defended Scotland Yard's actions, saying: "Our duty is to do so in a proportionate manner in line with relevant legislation."
The policing operation had around 11,500 police officers on duty on Saturday.
Listen to our guide to the coronation in our latest What You Need Know podcast's episode