Celebrity·Posted on Oct 21, 2018How Much Do You Know About The Duke And Duchess Of Cambridge And The Duke And Duchess Of Sussex?All about William, Catherine, Harry, and Meghan.by Sheridan WatsonBuzzFeed StaffLinkFacebookPinterestTwitterMailBuzzFeed Quiz Party! Take this quiz with friends in real time and compare resultsCheck it out! FYI: The Royal Fab Four = the Duke and Duchess of Cambridge and the Duke and Duchess of Sussex.