Popsugar Fashion The Royals Kate Middleton White Dress at State Banquet 2019 How the Duchess of Cambridge Paid Tribute to Princess Diana and the Queen Mother at the State Banquet 4 June 2019 by Erin Cullum Image Source: Getty / WPA Pool The Duchess of Cambridge arrived at Buckingham Palace for the State Banquet in honour of Donald Trump's UK visit on Monday, and she found the perfect dress for the black-tie occasion. She walked side-by-side with the US Secretary of the Treasury, Steven Mnuchin, in a white gown by Alexander McQueen, one of the Duchess of Cambridge's go-to designers. Her long, pleated dress with cap sleeves flowed across the floor as she made her way into the event with the rest of the attendees, including Prince William, British Prime Minister Theresa May, and the host, Queen Elizabeth II. The stunning mum of three paired the McQueen dress with Princess Diana's Lovers Knot tiara and sapphire and diamond earrings borrowed from the Queen Mother's collection. The late Queen Mother was photographed wearing the same earrings in 1986. See Kate's gorgeous ensemble ahead, and see how she paid tribute to the women who came before her. Related: The Duchess of Cambridge's Most Powerful Looks Have This 1 Thing in Common The Duchess of Cambridge Wearing Princess Diana's Tiara and the Queen Mother's Sapphire Earrings at the State Banquet Image Source: Getty / Max Mumby/Indigo 1 / 8 The Queen Mother Wearing Her Sapphire Earrings in 1986 Image Source: Getty / Anwar Hussein Shown beside the Duchess of Cambridge wearing them in 2015. 2 / 8 The Duke and Duchess of Cambridge Arriving at the State Banquet Image Source: Getty / Max Mumby/Indigo 3 / 8 The Duchess of Cambridge and Steven Mnuchin at the State Banquet Image Source: Getty / WPA Pool 4 / 8 The Duchess of Cambridge and Steven Mnuchin at the State Banquet Image Source: Getty / WPA Pool 5 / 8 The Duchess of Cambridge and Steven Mnuchin at the State Banquet Image Source: Getty / WPA Pool 6 / 8 Theresa May, The Duke of Cambridge, the Duchess of Cambridge, and Steven Mnuchin at the State Banquet Image Source: Getty / WPA Pool 7 / 8 The Duchess of Cambridge Wearing Alexander McQueen at the State Banquet Image Source: Getty / WPA Pool 8 / 8 The RoyalsThe British RoyalsDressesKate Middleton