The Duchess of Cambridge showcased the best of British fashion with her elegant choice of dress at tonight’s Earthshot reception at COP26.

As she joined Prince William, also 39 years old, at the Clydeside Distillery, in Glasgow, she stepped out in a coat from London-based brand Eponine with coordinated navy accessories by LK Bennett.

Despite the dress being from the brand’s SS20 collection and Kate frequently wearing Eponine, it is believed to be the first time that she has been photographed wearing the coat.

However, she’s been pictured more than a dozen times in her £425 heels from fellow British designer Rupert Sanderson. 

The royal has been photographed in the Malory’ pumps at least twelve times, including at the Commonwealth Day Service at Westminster Abbey and at a dinner at Kensington Palace with the Obamas in 2016. 

The Duchess of Cambridge proved she scrubbed up well tonight as she swapped her muddy outdoor outfit for a dazzling evening gown to attend the Earthshot reception at Cop26 in Glasgow tonight

Tonight, the Duchess of Cambridge proved that she can scrub up well as she changed her muddy outdoor outfit for a stunning evening gown to attend tonight’s Earthshot reception at Cop26 in Glasgow.

Kate (pictured) opted for a custom dress from British brand Eponine, believed to cost around £2,4000 t

Kate swept her glossy brunette hair into a low bun, which allowed for a full view of the sharp tailoring of the couture dress and its double button detailing

Kate (pictured) opted for a custom dress from British brand Eponine, believed to cost around £2,4000 teamed with her favourite £425 heels from Rupert Sanderson

The 39-year-old's elegant choice of dress perfectly complimented Prince William's dapper navy suit. Pictured: Duchess of Cambridge offering a tub of dead larvae to Will

The elegant choice made by the 39-year old was perfect for Prince William’s navy suit. Pictured: Duchess of Cambridge offering a tub of dead larvae to Will 

Kate, who is famous for creating a frenzy in shops with her fashion choices has opted for an Eponine custom item.

Made from a double wool crepe fabric, the price is available on application but similar dresses cost around £2,400.

She swept her glossy brunette hair into a low bun, which allowed for a full view of the sharp tailoring of the couture dress and its double button detailing.

The Duchess and Prince William looked elegant in matching navy suits and white shirts, as did the Duchess. 

Fashion stylist Rochelle White spoke to Femail about Kate’s choice of outfit at the event, saying: ‘Kate is wearing a dress that she hasn’t worn before, it is a simple and striking in colour. The dress is custom-made for her by Eponines. 

Kate (pictured centre, with guests) accessorized her look with silver drop earrings and a navy suede clutch bag from LK Bennett

Kate (pictured center, with guests) accessorized with silver drop earrings from LK Bennett and a navy suede bag from LK Bennett 

Fashion stylist Rochelle White, explained that Kate had likely made her outfit choice with the idea of not drawing attention to herself. Pictured: Royal couple speaking to guests at the event

Rochelle White, fashion stylist, said that Kate likely chose her outfit to avoid drawing attention to herself. Pictured: The royal couple speaks to guests during the event

Kate opted for understated with glamour with a subtle pink blusher on her cheeks and a nude lipstick that appears almost natural

Kate chose to be understated and glamourous with a subtle pink blusher for her cheeks. She also used a nude lip color that looked almost natural. 

Williams’s suit and colour complement her dress. Williams has chosen for her hair to be combed and simple jewellery to accessorize.

‘I feel that Kate has opted for this look, so that the focus isn’t necessarily on her and her outfit, but more for the event. It is a sublet dress, but the color makes it stand out and adds something to the look.    

The ceremony tonight was hosted by Prince Charles, Camilla, Duchess of Cornwall and Boris Johnson as well as key members of the Sustainable Markets Initiative, the winners and finalists for the first Earthshot Prize Awards. 

Duchess of Cornwall Camilla, 74, also opted for a shade of blue as she attended the event in a teal dress. Pictured: Prime Minister Boris Johnson greeting Camila and Prince Charles

Duchess of Cornwall Camilla, 74, also opted for a shade of blue as she attended the event in a teal dress. Pictured: Prime Minister Boris Johnson greeting Camila and Prince Charles

Kate (pictured centre) appeared in good spirits as she joined discussions with key members of the Sustainable Markets Initiative and the Winners and Finalists of the first Earthshot Prize

Kate (pictured centre) was in good spirits while she participated in discussions with key members from the Sustainable Markets Initiative, and the Winners & Finalists of Earthshot Prize 1.

Kate's go-to heels from Rupert Sanderson could be seen as she climbed the stairs with Prime Minister Boris Johnson and Prince William

Kate wore Rupert Sanderson’s shoes as she climbed up the stairs with Prime Minister Boris Johnson (Prince William). 

Camilla, who is 74, also chose a shade blue. Teal Bruce Oldfield buttons with buttons that were taken from another outfit.

William and Kate’s appearance comes just hours after royal couple, both 39, visited Alexandra Park Sports Hub in Dennistoun to meet with Scouts from and learn more about the group’s’ #PromiseToThePlanet campaign.

The event marks the first engagement for the couple since they arrived in the Scottish city for the COP26 conference which has brought world leaders together to discuss urgent action on climate change. 

Cop26 organizers will be disappointed by the Queen’s decision not attending. Few people can command the same respect or authority as the British monarch on the international stage. 

Kate (pictured centre) welcomed guests as they arrived at the Clydeside Distillery in Glasgow

Kate (pictured center) welcomes guests at the Clydeside Distillery, Glasgow.

The absence of the head of state is a concern. It is hoped that other world leaders will not use her absence to avoid attending the summit.

It was previously reported that Xi Jinping, the president of China, is skipping the highly-anticipated conference.

The Prince of Wales, the Duke of Cambridge, and the Duchesss-of-Corinth will continue to be representatives of the Royal Family. They both have strong environmental campaigning credentials and are represented by the Duchess-of-Corinth and the Duchesss-of-Cambridge.

Senior royal aides confirmed that the Queen will be working behind the scenes to make this summit a success.

She will be filming her video message at Windsor Castle this week.