Prince William will morph into King William pretty much the second King Charles passes away, and in that moment the title "Prince of Wales" will technically "ceases to exist," according to Brittanica.

King Charles's final act as the Prince of Wales as he rushed to be by his mother's side has been revealed. Charles had received a phone call from his sister Princess Anne urging him to immediately ...

Kate Middleton and Prince William are celebrating King Charles' birthday! See the tribute as the King turns 76 on Nov. 14 ...