King Charles has departed the US after a four-day state visit comes to a close
President Donald Trump earlier called him "the greatest king in my book", as he said farewell to the King and Queen at the White House
The official goodbye showed the pair's different approaches, our royal correspondent writes - Trump was happy to chat in front of the camera, while the King seemed less enchanted
On their last day in the US, the royals met locals in the town of Front Royal in Virginia - the King also laid a wreath at the Tomb of the Unknown Soldier at Arlington National Cemetery
The King's plane will be heading to Bermuda - a British overseas territory, where he is head of state
Image source, Getty ImagesA few minutes later, the group emerges from the White House.
Standing in the doorway, the King and Trump appear to have a brief conversation, and they continue chatting as they make their way down the red carpet towards the car.
They exchange goodbyes before the King and Queen enter the car to be driven away.
Image source, Getty ImagesPresident Trump points towards the King and tells the gathered press: "Great king."
"The greatest king in my book," he adds.
The group pose for pictures before heading inside.
Image source, Reuters
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Image source, Getty ImagesThe King and Queen have just arrived at the White House.
They leave a black car, are are greeted by President Trump and First Lady Melania Trump.
Image source, ReutersPresident Donald Trump and First Lady Melania Trump are about to say a formal farewell to King Charles and Queen Camilla.
Outside the White House - on the South Portico - the scene is currently set with a red carpet and flags from both countries.
We expect to see them imminently - you can watch live at the top of the page.
From addressing Congress, to feeding chickens in New York, and to meeting Lionel Ritchie - it has been a busy state visit for King Charles and Queen Camilla.
Image source, ReutersThe King reviewed a military guard of honour with President Trump during the formal welcome ceremony at the White House
Image source, ReutersThe King addressed Congress - the first time a sitting British monarch had done so since his mother, Queen Elizabeth II, in 1991
Image source, Getty ImagesThe royals were then treated to a lavish and star-studded state dinner
Image source, Getty ImagesTravelling to New York, the King and Queen laid flowers at the September 11 Memorial before meeting families of those who died, and speaking to some of the first responders
Image source, Getty ImagesDuring his visit to a education and healthy food initiative in Harlem, the King helped a group of children feed some chickens, and planted seeds
Image source, Getty ImagesThe King and Queen ended their third day at the Rockefeller Center, where they celebrated 50 years of the King's Trust charity at an event attended by global ambassador Lionel Richie
Image source, ReutersThe King and Queen pictured alongside the US president and first lady at a state dinner earlier this week
The King and Queen will soon be greeted by the president and first lady for a formal farewell on the final day of their state visit to the United States.
The royals will then head to neighbouring Virginia, where they will lay a wreath at Arlington National Cemetery, before attending a party to celebrate the United States' 250th birthday.
Earlier in the pomp-filled four-day trip, the King delivered an address to Congress - which was greeted by a standing ovation - and was treated to a lavish state dinner.
After leaving the US later, the King will pay a visit to Bermuda - a British overseas territory, where he is also head of state - before returning to the UK.
We're now resuming our live coverage of the state visit, and will bring you updates in this page.
Want more from the royal visit to the US? Here's where to read and watch the best material on the BBC News website.
How the King and Queen spent their second day in the US
Image source, ReutersFrom all the grandeur in Washington, will better relations between the US and UK emerge?
The British government certainly hopes so, and the reception the royals received will doubtless encourage ministers and officials.
A military ceremony and speech by Donald Trump kicked off celebrations yesterday, with the president saying Americans have had "no closer friends than the British".
The King's address to the Congress then called for continued cooperation between London and Washington on defence matters, including supporting Ukraine and resisting calls for the UK-US alliance to "become ever more inward-looking".
But eyebrows were raised later in the evening.
During a state dinner, Trump suggested the King was supportive of his Iran policy - to which Buckingham Palace said the monarch is simply "naturally mindful" of the British government's established position on nuclear weapons.
The King emphasised his earlier support of Nato during his toast at a state dinner, a message Downing Street will hope sticks in the president's head.
Commentators on both sides of the pond have hailed the King and Queen's visit as a diplomatic success - but questions remain around whether the positive mood will survive after the royals set off for New York.
Henry Zeffman
Chief political correspondent
There is definite relief and happiness in government that the King’s state visit has gone so well.
That would of course be the case at any time, but especially so given transatlantic relations have been so strained of late.
However, among figures in government there is also realism.
Just because Donald Trump has spoken so affectionately of Britain in the presence of the King, it does not mean his frustration with Sir Keir Starmer and the British government is likely to abate.
After all, Trump’s state visit last year to the UK went off without a hitch — including a press conference alongside Starmer at Chequers where the president was on his best behaviour.
Nevertheless, within a few months the differences on foreign policy between both leaders began to show more and more prominently.
Of course, for all that Starmer would no doubt prefer not to be derided on social media by the US president periodically, he has sought to turn their dispute to his advantage politically, arguing that it shows he will stand up for the national interest in a way his opponents would not.
Don’t expect the PM to cease making that argument anytime soon, whatever the lingering warmth from this royal tour.
Image source, EPA/ShutterstockIt's very early in the US but later we'll see King Charles and Queen Camilla visiting New York, where they'll meet families of victims of the 9/11 attacks ahead of the 25th anniversary later this year.
The King will then visit a grassroots urban farming initiative that works to mentor children affected by food insecurity.
The Queen will celebrate British and American literature at an event with The Queen's Reading Room, the charity she founded, alongside high-profile authors.
Later, the King will meet business and financial leaders at an event designed to promote transatlantic trade.
Then there will be a reception to celebrate the work of the The King's Trust charity, which is expected to focus on cultural and creative links between the US and UK.
Adam Goldsmith
Live reporter
Image source, Bettmann via Getty ImagesDuring his Washington speeches last night, King Charles referenced two historical events to get a laugh - though neither seemed like much of a laughing matter at the time.
King Charles thanked Trump for a "splendid dinner", joking it was a "significant improvement on the Boston Tea Party" - an incident in 1773 which saw hundreds of angry Bostonians charge into the city's harbour, storm British ships and throw over 300 chests of valuable tea into the sea.
The riotous scenes followed the imposition of taxes on the importation of tea from across the Atlantic, and marked a key moment in the American revolution which ended British rule.
Referencing the president's plans to construct a ballroom on the White House East Wing, Charles said: "I am sorry to say that we British, of course, made our own attempt at real estate redevelopment of the White House in 1814."
The King was referencing the burning of Washington in 1814, when British troops set fire to the White House as American President James Madison fled.
The attack, a retaliation for an American attack on Upper Canada's capital York, marked the only time a foreign power has captured and occupied Washington.
Image source, Bettman / Getty ImagesAn undated drawing shows the burning of Washington, DC, by the British in 1812. The White House is seen in the background
Image source, PA MediaThe royal visit to the US has put renewed attention on anti-Trump protests which have sought to frame the president as a would-be king.
Demonstrations have been held across the US over the last year under the banner No Kings, a slogan which harks back to America's anti-monarchy foundation.
Asked about the comparison, Marc Lotter, who worked as a strategist on Trump's 2020 election campaign, says the president has no plans to try and extend his time in power beyond 2028, when the constitution stipulates he must leave office.
Trump does "absolutely not" see himself as a King, Lotter says, adding: "There is no discussion of, obviously, being a monarch."
Lotter says the bipartisan warm reception in Congress for the King was something that hasn't been seen in "a number of years", adding: "Nothing in the United States could get both Democrats and Republicans in the Congress to rise together and applaud except the King."
Tara Mewawalla
Live reporter
Image source, Daily Mirror/ PAThe UK's ambassador to the US found himself at the centre of press attention on Tuesday
While this state visit to the US has been framed by many commentators as a triumph so far, it has not passed off entirely without diplomatic incident.
The King arrived at the White House yesterday just after the Financial Times reported the UK's ambassador to Washington had told a group of students that America's only "special relationship" is "probably Israel".
Sir Christian Turner's leaked comments from February were "private" and "informal", the Foreign Office said, and were "not any reflection" of the government's position.
Later, during a state banquet, the issue of the Middle East came to the fore again, with Donald Trump suggesting the King backed his policy on Iran, a war which has strained relations between the UK and US.
The Palace said the King had simply reflected the government's long-standing position on Iran during his discussions with the president.
And remarks by the King touched on sensitive matters too, particularly when he said the Nato military alliance was important in a "an increasingly complex and contested world".
Trump, a long-time Nato sceptic, has renewed his criticism of fellow members over their lack of material support for his war against Iran.
Image source, AFP via Getty ImagesSecurity has been extremely tight in Washington for the King and Queen's visit, with armed police stationed around key sites
Image source, AFP via Getty ImagesRoads were blocked as the royals made their way to the White House on Wednesday, bringing parts of DC to a standstill
Image source, AFP via Getty ImagesThe massive presence comes after security arrangements around the president came under scrutiny in the wake of a major breach on Saturday
Image source, AFP via Getty ImagesA gunman was able to run past several Secret Service personnel and get into a building where the president was attending an event before being stopped, prompting questions about protection for the royals
Image source, The Washington Post via Getty ImagesDavid Manning,a former British ambassador to the US, says it is a "very good thing" this royal visit was able to go ahead in light of the "strained relationship" at present between London and Washington.
There was some doubt around plans after a gunman stormed a hotel where Donald Trump was attending an event at the weekend.
But the visit has gone ahead largely as planned, which Manning says has allowed the King to "deliver key messages in an excellently crafted speech".
He tells BBC Radio 5 Live Breakfast that references to Nato in particular were "very important", adding: "I think the whole idea [is] that we are stronger both bilaterally and internationally together."
James Landale
Diplomatic correspondent
How diplomatically embarrassing is Donald Trump’s claim the King agrees with him Iran should never be allowed a nuclear weapon?
Does this risk dragging the monarch into the turbulence of the Middle East conflict?
Probably not.
We don’t know precisely what the King said. The US president may not be a reliable correspondent.
If the King did express this view, he may only have been reflecting the longstanding position of his current and past governments which have all sought - along with allies - to stop Iran developing nuclear weapons.
Supporting that policy, largely through diplomacy and economic sanctions, is not the same as endorsing what some consider to be an illegal and ill-conceived war on the Islamic republic.
Remember, Iran itself claims it does not want a nuclear weapon - what is disputed is how to ensure that by checks and restrictions.
In the UK there may be a convention of never reporting what the King says in private. But this US president is nothing if not a convention-buster.
A former royal insider says the King's US charm offensive has "pressed the reset button" on relations between London and Washington.
Ailsa Anderson, who was Queen Elizabeth II's communications and press secretary between 2001 and 2013, says Charles "feels more confident delivering these big speeches".
She tells BBC Radio 5 Live Breakfast: "Although he's a head of state, he's not a party political person - he was the one that actually could deliver something quite exceptionally special to the American people over the last two days."
Image source, AFP via Getty ImagesKing Charles has "steadied the ship" between the US and UK at a time when political relations are "not great", a former royal communications secretary has said.
Simon Lewis, who was Queen Elizabeth II's communications secretary from 1998 to 2000, tells BBC Radio 4's Today programme that the King gave "two incredibly well-judged speeches" on Tuesday.
Lewis says ministers and officials will be "hoping that the mood music trickles down" after a visit which "would have been arranged hand-in-glove with the government".
He goes on: "A lot of people in government today will be feeling a lot more positive about the relationship between the prime minister and the president going forwards."
Joe Coughlan
Live reporter
Image source, ReutersIn between the jokes and laughs shared by Donald Trump and King Charles, day two of the state visit hinted at a clash of attitudes towards Nato.
The King spoke about his time in the Royal Navy to praise the benefits of military ties between the US and UK during his speech to the US Congress.
He also pointed out that the 11 September, 2001 attacks in New York triggered the one and only use of the military alliance's Article 5 mutual defence pact.
Donald Trump has frequently been a Nato sceptic, wondering aloud last month whether allies "would ever be there" for the US in the context of the Iran war.
He has also criticised British naval capacity, calling its ships "toys" and saying UK aircraft carriers "didn't work".
The King returned to the theme of Nato during his toast at a state dinner later in the day, saying the alliance is important in an "increasingly complex and contested world".