On arrival on Monday morning, Donald and Melania were officially welcomed by the Queen along with Prince Charles and Camilla in the Buckingham Palace Garden - before enjoying a lunch at the palace and a visit to the Picture Gallery, which showcased items of historical significance to the United States from the Royal collection. The President was then joined by the Duke of York for a visit to Westminster Abbey to lay a wreath at the Grave of the Unknown Warrior.
Mr Trump also praised the courage of the British people during the Second World War
and called the Queen a "great, great woman".
In her speech, the Queen spoke of the "new challenges" the US and the UK face in the 21st century, and stressed the bonds between the two countries. The Queen also mentioned the US and UK's "strong cultural links and shared heritage" and said the two nations were "bound by the strength and breadth of our economic ties".
She continued: "Mr President, as we look to the future, I am confident that our common values and shared interests will continue to unite us. "Tonight we celebrate an alliance that has helped to ensure the safety and prosperity of both our peoples for decades, and which I believe will endure for many years to come."
The Queen finished by inviting the room to raise a toast to the "continued friendship between our two nations, and to the health, prosperity and happiness of the people of the United States".
On Monday evening, President Donald Trump and his wife Melania ended the first day of their UK visit with a state banquet at Buckingham Palace. Hosted by the Queen, the President and First Lady of the United States were welcomed into the opulent Buckingham Palace ballroom.
The Queen and Donald Trump entering the Buckingham Palace ballroom, which features six glittering chandeliers and the vast white-clothed horse shoe-shaped table has been laden with George IV's silver gilt Grand Service dinner set.
Melania wore a custom made Christian Dior Spring 2019 Couture gown.
Prince William accompanied Theresa May.
For the first time she wore her dark blue sash of the Dame Grand Cross of the Royal Victorian Order, as well as the Royal Family Order.
The couple were joined by four of Donald's five children, Ivanka, Tiffany, Donald Trump Jr and Eric, along with several members of the royal family. Prince Charles and the Duchess of Cornwall – who had welcomed Donald and Melania to Clarence House for tea earlier in the day – were also in attendance, as well as the Duke and Duchess of Cambridge. Other royals at the lavish event included the Countess of Wessex, Prince Edward, Prince Andrew and Princess Anne. Theresa May and US Ambassador Woody Johnson were also among the attendees. During the evening, both the Queen and the President made speeches.
Take a look at the best photos from the evening…
The Duchess of Cambridge wore a gorgeous white Alexander McQueen dress accompanied by stunning jewellery for the big occasion. On the night she wore the Lover's Knot tiara and the Queen Mother's Sapphire and Diamond Fringe Earrings.
The Duchess wore a beautiful Alexander Mc-Queen gown with ruffled details.
