President Donald Trump and First Lady Melania Trump were hosted by King Charles III at Windsor Castle with a full carriage procession ceremony Wednesday. WINDSOR, ENGLAND - SEPTEMBER 17: (L-R) Catherine, Princess of Wales and William, Prince of Wales receive US President Donald Trump and First Lady Melania Trump at Windsor Castle on September 17, 2025 in Windsor, England. Trump’s wife, Melania TrumpFirst lady Melania Trump visits the Children’s Inn at National Institutes of Health on Feb. 14, 2020 in Bethesda, Maryland. Trump's father-in-law, Victor KnavsVictor Knavs, 80, is Melania Trump's father. Trump has 10 grandchildren:Kai Madison Trump, 17Donald John Trump III, 15Tristan Milos Trump, 13Spencer Frederick Trump, 12Chloe Sophia Trump, 10Arabella Rose Kushner, 12Joseph Frederick Kushner, 11Theodore James Kushner, 8Eric "Luke" Trump, 7Carolina Dorothy Trump, 5Kai Trump, Trump’s oldest grandchild, is an aspiring social media influencer.