US President Donald Trump and First Lady Melania Trump have arrived in the UK for a three-day state visit.
Mr Trump will meet members of the Royal Family, and is expected to discuss climate change and Chinese technology firm Huawei during talks with outgoing Prime Minister Theresa May.
Minutes before touching down, Mr Trump criticised Mayor of London Sadiq Khan, with whom he has clashed in the past.
He tweeted that Mr Khan- whohad earlier said the UK should “not roll out the red carpet” for Mr Trump – was a “stone cold loser”, but the president added he was looking forward to his visit.
Protests are planned in several UK cities during the visit, including London, Manchester, Belfast, and Birmingham.
Before the visit, President Trump told the Sun newspaper he was backing Conservative Party leadership contender Boris Johnson to be the next UK prime minister.
On Monday, the president will be given a tour of Westminster Abbey and will also meet Prince Charles and the Duchess of Cornwall for tea at Clarence House.
In the evening, the Queen will host a state banquet at Buckingham Palace for the president and the First Lady Melania Trump.
On Sunday, Mr Trump denied calling Megan Markle “nasty,” despite him using the word on tape.