Prince George has delighted fans and joined his father Prince William in the royal box at the FA Cup Final. The 10-year-old accompanied the Prince of Wales to Wembley Stadium to watch Manchester Unied and Manchester City compete for the FA Cup. Prince William, who is president of the Football Association, shook hands with the team players before taking his seat alongside his son in the royal box shortly before the 3pm kick-off. The pair appeared to be in high spirits as they took their seats and looked at the stadium. The father and son duo, who are both passionate Aston Villa fans, watched th…