Forget bilateral meetings and photo ops at Downing Street: When it comes to navigating an uncommonly turbulent era in the Special Relationship, the U.K. government’s most powerful diplomatic tool may be sparkly and worn on somebody royal’s head.
We refer, of course, to the epic demonstration of “tiara diplomacy” — that is, wheeling out the royals in full Beribboned and Bejewelled mode — the world is being treated to as Britain welcomes Donald Trump for his second state visit to the island nation. And after the lavish state banquet last night, it seems to have worked: Trump said it was “one of the highest honours of my life” to be honoured in such a way.

Britain’s King Charles stands beside U.S. President Donald Trump and Kate, Princess of Wales, to deliver a speech at a State Banquet in Windsor Castle, England, on Sept. 17, 2025.
Yui Mok/PA via APTechnically, it was the King who signed the Trumps’ invitation to England, although, as with all state visits, it’s at the behest of the government, not the royals’ whim. It was hand-delivered by U.K. Prime Minister Keir Starmer when he met with the U.S. president in Washington earlier this year. Trump said yes on the spot.
That’s why the Royal Family is front-and-centre when it comes to hosting duties, flexing all the soft power at their disposal (and, perhaps, reminding the British public why they’re worth keeping on.)
Here’s everything you need to know about how the royals are rolling out the red carpet for Trump this week.

Kate, Princess of Wales and First Lady Melania Trump walk with Chief Scout for the Scout Association Dwayne Fields.
Nathan Howard/Pool Photo via APKate and Melania did a joint engagement with the Scouts
In one of the more interesting items on the itinerary, the Princess of Wales and the first lady spent official time together on Thursday.
Just after Trump took his leave from King Charles to go and meet with Starmer, the U.K. Prime Minister, the Princess of Wales took the First Lady to meet with a group of scouts on the grounds of Windsor Castle — specifically Frogmore Cottage, which used to be Harry and Meghan’s English home.

First Lady Melania Trump and Catherine, Princess of Wales join a group of Squirrels from the Scout Association at Frogmore Cottage on the Windsor Estate.
Nathan Howard/POOL/AFP via Getty ImagesThe two women seemed rather in sync, and well-coordinated: They arrived chatting and laughing, both wearing the classic American brand Ralph Lauren in autumnal colours. The relaxed, smiling ease Kate is known for seems to have rubbed off on the often stiff First Lady.
Kate, who’s president of the Scouts, sat on the grass admiring some of the children’s artwork while Melania was given a tour of some “bug hotels” other Scouts were building; together, they joined in a game where you toss balls in a parachute.
They each gave the Scouts honey as gifts: Melania gave the kids jars of White House honey, while Kate’s offering took the form of sandwiches made with honey collected at her country home, Anmer Hall.
As well, Queen Camilla was to give Melania a tour of the library at Windsor Castle, plus a look at the famous Queen Mary’s Doll House.
While Melania was the guest of honour at this outing, it marks a significant moment in the Princess of Wales’s royal career. In yet another nod to her growing responsibility with The Firm, this joint engagement with the First Lady — no other family members around, just her — is a big deal within the family hierarchy, and a first for her.
It may also be strategic: Trump hailed Kate as “radiant and so healthy and so beautiful” in his speech at the state dinner, and giving her such a prominent hosting role may be yet another aspect of the diplomatic flattery this visit has been all about.
Reactions to the Trump visit
While this visit has been all smiles and back-and-forth compliments from the royals, Trump has not received such a warm welcome from all their British subjects. Yesterday, about 5,000 people gathered in London to protest Trump’s second state visit, holding signs that read messages like “feed him to the Corgis” and in one case, an inflatable that depicted an orange Trump in a diaper. There was also a smaller protest outside the state banquet at Windsor Castle.

Catherine, Princess of Wales and Prince William, Prince of Wales arrive for the state banquet.
Aaron Chown-WPA Pool/Getty ImagesTiara diplomacy was in full force at the state banquet
Putting the actual tiara in Tiara Diplomacy, the public centrepiece of this visit is the state banquet on Wednesday evening. Always an occasion when the royals dial the pomp and circumstance up to 11, it’s also a chance for them to raid the family jewel box and, if they’re a woman, wear a tiara.
The evening’s State banquet was complete with a table-setting so elaborate it reportedly takes staff three days to set up. The menu features Ballotine de Poulet Fermier en Robe de Courgettes (that’s chicken wrapped in zucchini to the rest of us) and a whisky sour cocktail garnished with a marshmallow as a nod to the American love of S’mores. While Trump doesn’t drink, they also served a cognac bottled in the year his mother was born, as a nod to his Scottish roots.
For the dinner, the Princess of Wales wore her go-to tiara, the pearl-forward Cambridge Lover’s Knot, and a new gold lace dress by Phillipa Lepley, a couture wedding dress designer she’d previously tapped for a blue evening gown in 2022.
President Trump and King Charles entered the banquet chatting animatedly, flanked by their wives. Melania wore a bright yellow off-the-shoulder column dress with a lilac belt by Carolina Herrera, a New York-based brand founded by a Venezuelan-American designer in 1981.
Queen Camilla wore an evening gown by Fiona Clare, one of her stalwart designers, with a repeat wear of the Belgian Sapphire Tiara she wore to the state banquet for South Africa’s president Cyril Ramaphosa in 2022.

Queen Camilla and First Lady Melania Trump at the state banquet at Windsor Castle on September 17, 2025.
Anna Moneymaker/Getty ImagesWilliam and Kate were tapped to be the welcome party
The Prince and Princess of Wales have been front and centre in this visit, having greeted Donald and Melania Trump when they arrived in Windsor on Wednesday morning.
William and Kate, who wore a burgundy coat dress by British fashion designer Emilia Wickstead, a Chanel bag and a brooch that belonged to Princess Diana, were waiting to greet the Trumps when their helicopter landed on the lawn at Windsor Castle. There was a round of warm handshakes, before they escorted the American couple to meet the King and Queen, who is back on duty after a bout of sinusitis.

Britain’s Catherine, Princess of Wales, Prince William, Prince of Wales, U.S. First Lady Melania Trump, Britain’s Queen Camilla, U.S. President Donald Trump and Britain’s King Charles III at a ceremonial welcome at Windsor Castle on September 17, 2025.
Andrew Caballero-Reynolds/AFP via Getty ImagesThere was a ceremonial exchange of gifts: Trump was given the flag that flew over Buckingham Palace on his second inauguration day, among other items. Melania, who wore a grey Dior skirt suit and a purple hat, received a handbag by British designer Anya Hindmarch. In return, they gave King Charles a replica of President Eisenhower’s sword, while Queen Camilla received ruby and diamond brooch by Tiffany & Co.
Thanks to the typically wet British weather, the carriage procession that followed was done in covered vehicles — denying the public a chance to see Trump and the King (whom he yesterday described as “my friend”) in conversation together.
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According to Trump, he and William had a “great” conversation when they met privately after attending the reopening of Notre Dame, while Kate was also present at the banquet held for the last state dinner, too.
The prince and princess’ prominent role in this visit is being interpreted as a sign of the couple’s steadily growing importance within the family.
Royal historians said UK government uses the royal soft power to help with political talks with its allies. (Sept. 15, 2025)
AP Video by Kwiyeon HaTrump has long had a fascination with the Royal Family
Like Teresa May before him, who invited Trump for his first state visit within days of starting his first term, Keir Starmer knows that the U.S. president is a big royal fan. “She is so sharp, so wise, so beautiful,” Trump said to Piers Morgan of the late queen in 2018. (He was similarly complimentary about Prince William, saying after he met him at the Notre Dame reopening last year that “he’s a good-looking guy.”)
As he heads to the United Kingdom, Donald Trump calls King Charles III, Queen Camilla “friends of mine for a long time.” Trump called the king an “elegant gentleman” and said, "he represents the country so well.” (Sept. 16, 2025)
AP VideoHis royal fascination seems to come from his Scottish-born mother, although in “The Art of The Deal,” he relayed his father’s opinion that the royals are “all a bunch of con artists.” For his part, Trump has met members of the Royal Family several times: Charles had tea back at Mar-a-Lago in the late 1980s, and apparently the two men still correspond, with The Telegraph even claiming they’re “pretty close.” Trump also claims to have met Princess Diana “a number of times,” writing in “The Art of the Comeback” that “I couldn’t help but notice how she moved people. She lit up the room with her charm, her presence. She was a genuine princess — a dream lady.” His 2019 state visit — the last Queen Elizabeth II ever hosted — seems to have been one of the highlights of his first term, although according to biographer Craig Brown the late queen actually found him “very rude.”
Another sign of his reverence for the queen? Trump was set to place a wreath on her tomb in St. George’s Chapel during this visit.