King Ralph

When the entire British royal family is killed in a freak accident outside Buckingham Palace, Sir Cedric Willingham leads a search for any surviving heirs to whom to pass Monarchy of the United Kingdom. After days of researching, his team finally locates a living heir in the form of an American named Ralph Jones. Shortly after being fired from his job as a lounge singer in Las Vegas, Ralph is informed by Cedric's assistant private secretary Duncan Phipps that his grandmother Constance had an affair with the first Duke of Warren while working as a hotel waitress when the Duke was visiting the United States, resulting in Ralph having royal blood. Phipps provides further proof by showing Ralph a duplicate of the ring his grandmother used to wear that the Duke had given her.