Lady Lola Bute joins Sienna Miller at glamorous society wedding for son of Pret founder Julian Metcalfe

Lady Lola Bute proved to be the ultimate fashionable wedding guest as she joined Sienna Miller at a lavish high society ceremony.

The aristocrat, 25, who is the daughter of the late John Crichton-Stuart, 7th Marquess of Bute and fashion designer Serena Bute, is thought to have attended the nuptials of Pret founder Julian Metcalfe's son Misha Metcalfe.

Lola put her best fashion foot forward as she donned a backless leopard print dress for the glamorous ceremony, before swapping into a mini silk pink frock featuring dainty straps.

Actress Sienna, who attended the socialite's raucous 25th birth bash in May, matched her pal in a backless silver number.

Lola took to Instagram on Wednesday to share a selection of photographs from the glamorous occasion, including of bride Rebecca, who is thought to work at auction house Sotheby's.

Lady Lola Bute proved to be the ultimate fashionable wedding guest as she joined Sienna Miller at a lavish high society ceremony

Lady Lola Bute proved to be the ultimate fashionable wedding guest as she joined Sienna Miller at a lavish high society ceremony

'I LOVE, LOVE! that was iconic', wrote the model, before tagging the bride and groom in her post.

The first photograph showed Lola holding a cigarette whilst outside at the unspecified location. She held a bouquet of white flowers in her hand, likely belonging to the bride initially.

Dressed to impress, the aristocrat teamed her pink party dress with a shimmering silver necklace and a smattering of glamorous makeup.

The second image shows Lola posing at the bar, alongside actress Sienna; the 42-year-old looked radiant in a silver gown.

Sporting a chic up-do hairstyle, the A-lister was all smiles as she posed with her pal, who opted for a daring backless floor-length dress for her first outfit of the wedding.

Sienna and her boyfriend Oli Green, 27, welcomed their first child together, a baby girl, in January. Sienna also has a daughter Marlowe, 10.

In two other photographs, Lola appears alongside interior designer friend Bach Hiscox. It is also thought the socialite posed with Julian Metcalfe.

Julian co-founded sandwich chain Pret in 1984 with college friend Sinclair Beecham and later sold it for £364million and now owns Japanese fast food empire Itsu.

The aristocrat (pictured), 25, who is the daughter of the late John Crichton-Stuart, 7th Marquess of Bute and fashion designer Serena Bute, is thought to have attended the nuptials of Pret founder Julian Metcalfe's son Misha Metcalfe

The aristocrat (pictured), 25, who is the daughter of the late John Crichton-Stuart, 7th Marquess of Bute and fashion designer Serena Bute, is thought to have attended the nuptials of Pret founder Julian Metcalfe's son Misha Metcalfe

In two other photographs, Lola appears alongside interior designer friend Bach Hiscox (pictured left)

In two other photographs, Lola appears alongside interior designer friend Bach Hiscox (pictured left)

The second image shows Lola posing at the bar, alongside actress Sienna; the 42-year-old looked radiant in a silver gown

The second image shows Lola posing at the bar, alongside actress Sienna; the 42-year-old looked radiant in a silver gown

Lola put her best fashion foot forward as she donned a backless leopard print dress for the glamorous ceremony, before swapping into a mini silk pink frock featuring dainty straps

Lola put her best fashion foot forward as she donned a backless leopard print dress for the glamorous ceremony, before swapping into a mini silk pink frock featuring dainty straps

Groom Misha Metcalfe is currently the Brand Director for Itsu, according to his LinkedIn.

Last month, Lola and her Dutch boyfriend Parker Van Noord, posed up a storm at Vogue World in Paris as they celebrated the model's 25th birthday. 

It was a more demure celebration for the socialite's birthday - after she threw a party to remember the month earlier so she could celebrate with all her friends and family.

Her early birthday bash, on the Isle of Bute, at her ancestral home Mount Stuart House, saw friends, from Hollywood stars to fashion icons and royalty, sip champagne and enjoy a dance at the event.

Among the dozens of guests were the actress Sienna, stunning New Zealand model Jessica Clarke, Princess Olympia of Greece, the make-up mogul Charlotte Tilbury with her West End producer husband George Waud and the socialite Poppy Delevingne.

It is also thought the glamorous socialite (pictured right) posed with Julian Metcalfe

It is also thought the glamorous socialite (pictured right) posed with Julian Metcalfe

Lola took to Instagram on Wednesday to share a selection of photographs from the glamorous occasion, including of bride Rebecca, who is thought to work at auction house Sotheby's
Lola took to Instagram on Wednesday to share a selection of photographs from the glamorous occasion, including of bride Rebecca, who is thought to work at auction house Sotheby's

Lola took to Instagram on Wednesday to share a selection of photographs from the glamorous occasion, including of bride Rebecca, who is thought to work at auction house Sotheby's

Lady Lola with interior designer friend Bach Hiscox (pictured left while at the wedding)

Lady Lola with interior designer friend Bach Hiscox (pictured left while at the wedding)

There was techno music and flashing lights, dining tables groaning with lobsters, oysters and local beef, a marching band of pipers and fireworks lighting up the skies above the Firth of Clyde.

Some images showed Lady Lola dancing freely, dressed in a silver mini-dress by designer Annie Doble.

Lady Lola’s late father, John Crichton- Stuart, the 7th Marquess of Bute – was better known as the racing driver Johnny Dumfries.