President Trump has landed in the UK for a three-day state visit that begins with lunch with the Queen.
Air Force One landed in Stansted Airport in Essex in the last few minutes.
The president will travel by helicopter to the US ambassador's residence in London, before starting a packed day of engagements.
Mr Trump and First Lady Melania will be greeted at Buckingham Palace by the Queen, the Prince of Wales and the Duchess of Cornwall.
Royal gun salutes will ring out from the Tower of London and Green Park, and the Queen will host a private lunch.
It is expected that the president and his wife will then head to Westminster Abbey to lay a wreath on the grave of the unknown soldier, ahead of the 75th anniversary of D-Day on 6 June.
Meanwhile Donald Trump has denied calling Meghan, the Duchess of Sussex, "nasty" despite the comments coming from a recorded interview.
Mr Trump was asked by The Sun's political editor about the Duchess's comments about him before he took office, and before she married Prince Harry, in which she said she might move to Canada if he won election.
