This evening, the Duke and Duchess of Cambridge joined the Queen, the Duke of Edinburgh and other royals at the Royal Windsor Horse Show for a pageant celebrating Her Majesty's 90th birthday.
The star-studded performance held in the grounds of Windsor Castle, celebrated Her Majesty's love of horses, her dedication to the Commonwealth and international affairs and her deep involvement with the Navy, Army and Air Force.
There were 900 horses and more than 1,500 people taking part to chronicle the Queen's birth, through to World War Two, her marriage, the Coronation and a reign of more than 60 years.
Kate wore a new ensemble consisting of a red Zara jacket (ID by @MorelMlany ) and white Dolce & Gabbana lace dress (ID by @MiddletonMaven).
The red Zara Blazer With Back Pleat (US$99) is cut with a swing silhouette and features a Peter Pan collar, two oversized buttons, besom pockets and a back pleat.
Under the jacket, Kate wore a white Dolce & Gabbana cotton-blend lace dress (US$5,995).
This midi dress is crafted from cotton-blend lace with sheer sleeves, and features a nipped-in waist and tiered skirt. It comes with a smooth satin slip for coverage.
The Duchess accessorized with the Queen's diamond chandelier earrings, which she has now loaned on a few occasions, and most recently for the Diplomatic Reception.
Kate carried her Prada black satin clutch with stone embellishment (US$1470) and a solid black shawl scarf (unidentified).
A reminder that tomorrow, William, Kate & Harry will launch their new mental health initiative Heads Together with their partner charities at Olympic Park.
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