<h1>British monarch to host US President for unprecedented second state visit at Windsor Castle September 2025</h1> The British monarch will host the US President for a state visit at Windsor Castle from September 17-19, 2025. The Prime Minister extended the formal invitation during a February visit to Washington. This marks an unprecedented second state visit for the President, who was previously hosted by the late Queen in 2019. The visit will include ceremonial welcomes and a state banquet at St. George's Hall. The invitation is viewed as reinforcing UK-US relations amid the President's tariff-focused economic policies.