The prince's office announced today that Prince William and his wife, the former Kate Middleton, will be in California for three days starting July 8 after their official tour of Canada.The trip will be William's first official trip to the United States and Kate's first-ever visit to the country. The royal couple - now known as the Duke and Duchess of Cambridge - married last week at Westminster Abbey in a ceremony seen around the world.They start their weeklong tour of Canada on June 30, visiting Ottawa, Prince Edward Island, Quebec, Alberta and the Northwest Territories, including a trip to the Arctic.