Princess Diana's two nieces, Lady Amelia and Eliza Spencer, stun in dazzling dresses as they attend the star-studded Air Ambulance charity gala

The Spencer sisters looked stunning in contrasting dresses as they attended the Air Ambulance ball on Wednesday evening.

Lady Amelia Spencer and Lady Eliza Spencer, the nieces of the late Princess Diana, looked elegant at the stunning black and white gala dinner at Raffles London at the OWO (Old War Office).

The socialite twins, both 31, opted for a sleek look as they both smoothed their blonde locks into ballerina-style balls.

Eliza went for a bright color palette as she donned a white figure-hugging dress with bow detailing across the chest, embellished with a mesh top and jewels around the bodice.

As an accessory, she added sparkling heels and matching earrings, while keeping her makeup natural.

Amelia made sure to complement her sister's look with a shimmering black number, complete with semi-sheer sleeves and a jeweled belt, which perfectly accentuated Eliza's look.

She opted for a radiant makeup palette, with a hint of blush highlighting her rosy cheeks.

During the event, Prince William thanked the nation for its “kind expressions of support” for his wife and father.

In a speech, the Prince of Wales said the heartfelt words of comfort his family received following Kate's hospitalization for serious abdominal surgery and King Charles' shock cancer diagnosis “mean a lot to us all.”

It was a particularly busy day for the prince – who is now the monarchy's most prominent public figure – as he presented more than 50 awards on behalf of the king.

The monarch is recovering at Sandringham after his first cancer treatment and Kate is home after abdominal surgery.

He left caring for his wife and three young children in Windsor to undertake a day of engagements, holding an investiture at Windsor Castle, followed by the charity fundraising event.

The Prince of Wales – who served as an air ambulance pilot in East Anglia – has been a patron of the organization since 2020.

Lady Eliza Spencer went for a bright color palette as she donned a white figure-hugging dress

The stunning dress featured bow detailing across the chest and was embellished with a mesh top and jewels around the bodice

Amelia made sure to complement her sister's look with a shimmering black number

The twins, nieces of the late Princess Diana, complemented each other with opposing color palettes

The socialite twins, both 31, opted for a sleek look as they both swept back their blonde locks into ballerina-style buns

William, keen to keep his father's news front and center in recent days, told his audience: 'I would like to take this opportunity to also say thank you for the kind expressions of support shown to Catherine and to my father, especially in recent days . It means a lot to all of us.

'It is fair to say that the past few weeks have had a rather “medical” focus. So I thought I'd join an air ambulance service to get away from it all!'

It comes after the Spencer twins stunned in colour-coordinated silver ensembles as they arrived on the Fashion Awards 2023 red carpet in December.

To showcase their stylish prowess, they opted for statement dresses from Gyunel Couture at London's Royal Albert Hall.

They looked effortlessly flawless in their glamorous attire at the prestigious fashion event.

Amelia made sure all eyes were on her as she donned a shimmering metallic silver floor-length dress with a corset neckline.

Amelia opted for a radiant makeup palette, with a hint of blush highlighting her rosy cheeks

Meanwhile, Eliza also went for natural makeup to highlight her beautiful facial features

Socialite and TV personality Tamara Beckwith, 53, wore a bejeweled mesh skirt and added a statement fur scarf

Lady Violet Manners, 30, wore a chic midi dress held up by stylish chain straps and a pair of black heels

Meanwhile, Eliza wore a mini version of the dress with an extravagant floral embroidered hemline. She added a mesh cape to the ensemble, with a delicate, Peter Pan-style embellished collar.

Amelia added a pop of color to her outfit with a statement red necklace and a matching pair of earrings from Boodles.

For the occasion, she styled her glossy blonde locks into a sleek ponytail, while Eliza opted for a stylish ballerina-style bun.

The pair went for a glamorous makeup look, complete with silver smokey eyeshadow to match their sparkling attire.

Eliza paired her mini dress with an elegant pair of pointed pumps in a matching silver shade from Gina Shoes.