Prince William and Kate Middleton’s wedding sparked a worldwide marketing frenzy. Their nuptials flooded the economy with what could be over a billion dollars of merchandise — a sales bonanza not seen since the wedding of Charles and Diana. As monarchy fans all over the globe open their wallets, savvy marketers everywhere are vying for a piece of the action. The pay-off can be especially lucrative for those lucky companies that obtain the Royal Warrant, the official seal of approval from the Queen herself. Go behind the scenes in the massive enterprise of marketing the royals.