The debut of Kate Middleton's wedding dress is, by far, one of the most iconic fashion moments in royal history. With its intricate embroidery and nine-foot train, the elegant Alexander McQueen number has officially joined the ranks of stunning wedding gowns worn by Queen Elizabeth and Princess Diana. And while royal enthusiasts may think that they know everything about Middleton's iconic look during her nuptials to Prince William, there's one fascinating detail that they might've missed.