United Kingdom, Sept. 17 -- US President Donald Trump has met with Catherine, Princess of Wales and Prince William during his second UK state visit.

The 79-year-old world leader and First Lady Melania Trump, 55, were welcomed to Windsor Castle by the royals on Wednesday (17.09.25) before meeting with King Charles III and Queen Camilla - who has recovered from acute sinusitis.

Taking to Instagram Stories, the Prince of Wales posted a picture of him meeting Trump with the President's aircraft the Marine One in the backdrop.

He captioned the post: "Welcome President Trump."

William, 43, introduced Trump to the King, 76, and could be heard saying "this is my father", as the pair met.

The monarch and the President shared a royal carriage ...