Kate Middleton
Kate Middleton sports the brocade coat dress at Hillsborough Castle Garden Party in Northern IrelandGetty

Kate Middleton has been keeping fashion lovers glued with her elegant style and eccentric choice of outfits during her various appearances at the Queen's 90th birthday celebrations and other official engagements.

On Tuesday (14 June), the Duke and Duchess of Cambridge jetted down to Northern Ireland after paying their respects to the Florida victims in London; and unfailingly Kate made heads turn when she recycled her 10-year-old cream-coloured brocade coat.

Greeted by the glorious sunshine of the country, Middleton looked splendid as she stepped out for the Annual Garden Party in Hillsborough Castle.

The Duchess wore the coat dress that was seen on her for the first time in 2006 at the wedding of Laura Parker Bowles and Harry Lopes.

On Tuesday, she paired the champagne-hued outfit by Danish designer Day Birger et Mikkelsen with an equally interesting accessory as she joined 2,500 guests at the historic house.

Kate Middleton
Kate Middleton attends Hillsborough Castle Garden Party in Northern IrelandGetty

With her hair coiffed into a pretty pleated bun on one side, the 34-year-old royalty accessorised her dress with a rose-shaped headgear. She wore the headpiece from the house of Lock & Co in the same colour as her dress. On previous occasions as well the Duchess had resorted to unique and colourful accessories to accentuate her favourite cream coat.

In 2006, the mother-of-two had paired her famous Day Birger et Mikkelsen outfit with a feathery-headgear and later she wore it again in 2011 with an oversized tilted hat at Zara Phillip and Mike Tindall's nuptials.

The dress, which has become a staple in Kate's wardrobe, features an impressive silhouette and an intricate brocade pattern. For the finishing touch, Middleton chose her go-to nude pumps and an LK Bennett clutch that complemented her ensemble during the outdoor party.