Article continues below advertisementPrince William made a royal surprise on Dancing With the Stars.During the 20th anniversary episode on Tuesday, November 11, the Prince of Wales popped up virtually to send good luck to his friend Robert Irwin and his dance partner, Witney Carson.Article continues below advertisementSource: Royal Reporter Lydia/YouTubePrince William made a surprise appearance on 'Dancing With the Stars.'Article continues below advertisement"Guys, you've got a seriously good chance of winning it," William said during a FaceTime call shown in the duo's pre-performance package.