The Queen, two future kings and a host of senior royals will be out in force to entertain US President Donald Trump during his state visit.
A ceremonial welcome in the gardens of Buckingham Palace and a grand white-tie state banquet in the ballroom all await the American leader on Monday.
Who from the Windsors will be doing their royal duty as the UK fetes the controversial billionaire-turned-politician?
– The Queen
The Queen is officially welcoming Mr Trump and First Lady Melania Trump to the UK, holding a private lunch at the palace, taking them on a tour of Royal Collection items in the Picture Gallery and then honouring the president with a lavish banquet.
She will exchange gifts with the Trumps, and in the evening deliver a speech and propose a toast to the president at the banquet, as is the custom.
The monarch has already met the US leader – he joined her for tea at Windsor Castle last July.
As they inspected a Guard of Honour, the president walked along before standing still in front of the Queen, meaning she had to navigate her way around him so they could walk side by side.
He later said of the sovereign in an interview: “That is a beautiful woman.”
The Queen – the nation’s longest-reigning head of state – is an expert at diplomacy, having entertained all manner of controversial leaders over the decades from Romania’s Nicolae Ceausescu to Russia’s Vladimir Putin.
– The Prince of Wales and the Duchess of Cornwall
Heir to the throne Charles, who is known for his strong stance on green issues, will have plenty of opportunity to raise environmental concerns with Mr Trump.
While the prince has called climate change “the wolf at the door”, Mr Trump has called it a “Chinese hoax” and “bullshit”.
Charles, like the rest of the royals, did not meet Mr Trump during his visit to Windsor last year.
But this time, the future king and the Duchess of Cornwall will join the Queen in officially welcoming the president.
The prince will inspect the Guard of Honour with Mr Trump – a role that used to fall to the Duke of Edinburgh before his retirement.
Charles and Camilla will also attend the private lunch, have afternoon tea with President and Mrs Trump at Clarence House, and be at the banquet in the evening.
The prince and Mr Trump have encountered one another previously – in New York during the prince’s 2005 tour to the US with Camilla.
Charles was also at former US president George HW Bush’s funeral in December, where Mr Trump was present.
– The Duke and Duchess of Cambridge
William, who is second in line to the throne and also a future monarch, and Kate will also be guests at the banquet.
They have attended a number of state dinners, including most recently one for the King and Queen of the Netherlands.
During Barack Obama’s 2011 visit, newlyweds William and Kate did not attend the evening celebrations, but had a special audience with the then-president and first lady Michelle Obama in the afternoon and forged a strong bond with the couple.
The duke is unlikely to be impressed with Mr Trump’s previous comments about his mother.
Mr Trump once said he would have slept with Diana, Princess of Wales, without hesitation.
In a Howard Stern radio interview recorded just months after the princess died, he also branded her “beautiful” but “crazy”.
Mr Trump used to bombard Diana at Kensington Palace with massive bouquets, according to broadcaster Selina Scott, who said he saw the princess as “the ultimate trophy wife”.
She added that Mr Trump gave Diana the creeps: “It had begun to feel as if Trump was stalking her.”
Mr Trump also made remarks about Kate after she was photographed sunbathing topless by the paparazzi in France.
Kate Middleton is great–but she shouldn't be sunbathing in the nude–only herself to blame.
— Donald J. Trump (@realDonaldTrump) September 17, 2012
“Kate Middleton is great – but she shouldn’t be sunbathing in the nude – only herself to blame,” he wrote on Twitter.
– The Duke of Sussex
Harry’s strong connection with the US through his American wife, Meghan, and the Invictus Games means he too has been called upon to meet the Trumps.
He will be at the private lunch in the palace, but the duchess, who is on maternity leave, will be at home with their four-week-old son, Archie.
The duke has already met Mrs Trump while in Canada for the Invictus Games in 2017.
According to Meghan’s father, Thomas Markle, Harry once urged Mr Markle to give Mr Trump a chance.
The duke’s father-in-law shared details of their private conversation in an interview with ITV’s Good Morning Britain.
He said: “Our conversation was, I was complaining about not liking Donald Trump, he said ‘Give Donald Trump a chance’.
“I sort of disagreed with that.”
Meghan has been a vocal critic of former reality star Mr Trump, backing his rival, Hillary Clinton, and suggesting before the 2016 election that she would leave the US if he won.
She previously labelled the billionaire “divisive” and a “misogynist”.
On a leaked tape from 2005 which surfaced during Mr Trump’s presidential campaign he was heard making lewd remarks about women.
“When you’re a star they let you do it. You can do anything,” Mr Trump said, adding later: “Grab them by the pussy. You can do anything.”
– The Duke of York
Andrew will accompany the Trumps to Westminster Abbey, where the US president will lay a wreath at the Grave of the Unknown Warrior and take a tour of the Abbey.
He will also be at the breakfast meeting between Mr Trump, Prime Minister Theresa May and business leaders on Tuesday morning.
The duke shares a love of golf with the American leader.
Mr Trump is a huge fan of the sport and owns golf resorts in Scotland.