Princess Eugenie wore a rose-gold dress with a pleated skirt for the dinner that followed her wedding to Jack Brooksbank.
Pictures released by the couple show the princess hand-in-hand with her drinks executive husband at the Royal Lodge in Windsor.
Her dress, with a flowing skirt and angular neckline, was designed by Zac Posen.
The US designer said he was inspired by the beauty of Windsor and its surrounding countryside, and picked the colour of the dress to reflect the blush of an English rose.
Eugenie's outfit, like her wedding gown, was adorned with details to reflect the history of the Royal Family.
The white rose of York was embroidered on both the shoulder of the dress and the fabric on the back that held together the cape, and the gown's silk came from the British Biddle Sawyer silk mill.
The princess also wore – as a hair slide – a wheat-ear brooch, first commissioned in 1830 for William IV, and passed down to Queen Victoria and eventually the Queen.
Mr Posen was pictured arriving at the ceremony itself, in a group that included actress Demi Moore.
The designer also stocks a black and white Eugenie sweater dress, priced at $525 (£400).
The pictures were released after it was revealed that Robbie Williams hopped on stage to entertain guests with a surprise performance.
The Angels, Let Me Entertain You and She's The One singer is reported to have sung some of his greatest hits at the evening party that followed a star-studded ceremony at Windsor Castle.
Williams had earlier been pictured arriving at the wedding with his actress and TV presenter wife Ayda Field.
Eugenie was reportedly introduced to the former Take That singer by her mother the Duchess of York on a Caribbean holiday in 2011.
Familiar faces including Kate Moss, Demi Moore, Naomi Campbell and Stephen Fry were among the 850 guests who attended the wedding.
Eugenie, who is ninth in line to the throne, married at St George's Chapel just five months after the church hosted Harry and Meghan's wedding.
Classical singer Andrea Bocelli performed two songs during the service, accompanied by the Royal Philharmonic Orchestra.
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Eugenie's older sister and maid of honour Beatrice read from F Scott Fitzgerald's novel The Great Gatsby.
Guests later enjoyed a red velvet cake made by London cake designer Sophie Cabot, which consisted of 400 eggs and at least 53 packs of unsalted butter.