Ready for spooky season! Princess Diana's nieces Lady Amelia and Lady Eliza Spencer stun in moody black dresses ahead of Halloween

Published: 11:08 EDT, 29 October 2026 | Updated: 11:11 EDT, 29 October 2026 Princess Diana's nieces, Lady Amelia and Lady Eliza Spencer, looked sensational as they stepped out in little black dresses for the Dune London AW26 Party. The sisters - twin daughters of Charles Spencer, 9th Earl Spencer, and Victoria Aitken - ushered in Halloween with flair at the 'After Dark' fashion event, which was held at the Stereo venue in Covent Garden on October 28.The duo posed up a storm as they modelled carefully coordinated, moody black outfits.Eliza, 33, stunned in a black velvet co-ord featuring a thick-strapped corset top with a curved neckline and a ruffled A-line skirt. She accessorised with a crystal-handled, blush silk handbag and matching metallic open-toe heels. Meanwhile, Amelia delivered drama in a long-sleeved, velvet jacquard A-line dress with front-seam black tights. Princess Diana's nieces, Lady Amelia (right) and Lady Eliza (left) Spencer, looked sensational as they stepped out in little black dresses for the Dune London AW26 Party Eliza (left), 33, stunned in a black velvet co-ord featuring a thick-strapped corset top with a curved neckline and a ruffled A-line skirt Amelia delivered drama in a long-sleeved, velvet jacquard A-line dress with front-seam black tightsPointed stiletto heels and a black silk bag - coordinating with her sister's - completed her striking look. Celebrating the British retailer's autumn/winter 2026 collection, the event highlighted Dune's new line of shoes and accessories designed to bring 'refined craftmanship' and 'a touch of elegance' to everyday style. Also in attendance were British actors Tom Taylor and Amir Wilson, model Leomie Anderson, model and DJ Kim Turnball, and fashion stylists Lesley Buckle & Simone Powderly. It's the first fashion event the sisters have been publically spotted at since they showcased their stylish autumnal wardrobes at a launch event hosted by luxury designer brand Marc Cain in early September. The two socialites were a vision of elegance as they were photographed inside the sprawling grounds of Hampshire's Four Seasons Hotel to celebrate the label's new Equestrian Grace collection on Wednesday.Lady Eliza opted for a long-sleeved shirt which she paired with a tweed mini skirt, dark ankle boots and gold statement stud earrings.Meanwhile, Lady Amelia kept warm with a light brown coat which she wore over a sleeveless mini dress and heels. Coordinating with her sister, the 34-year-old also slicked back her hair to showcase a pair of near-identical earrings.The new collection by luxury fashion brand Marc Cain launched on September 2 and features a number of elegant pieces that seek to combine 'heritage codes' and 'modern femininity'. Princess Diana's twin nieces Lady Amelia and Lady Eliza Spencer showcased their stylish Autumnal wardrobes at a launch event hosted by luxury designer brand Marc Cain The two socialites were a vision of elegance as they were photographed inside the sprawling grounds of Hampshire's Four Seasons Hotel to celebrate the label's new Equestrian Grace collection in September Sharing behind-the-scenes footage from the sisters' photoshoot in the 500-acre Four Seasons estate, the brand's official Instagram page described Eliza and Amelia as 'taking fashion to the countryside'.That evening, the Spencer sisters joined star-studded guests for an outdoor dinner at the luxury hotel - including Rod Stewart's daughter Renee.A month prior to the event, Eliza broke her silence on Prince Harry and Meghan Markle's return to the UK in August - becoming the first member of the Duke of Sussex's family to publicly comment on the matter.During a launch event for her Lala V rose on the same day that Harry and Meghan touched down in Birmingham, Eliza said it was 'exciting' that her cousin, 41, was back in Britain.The daughter of Earl Spencer, who hosted the Sussexes at the family's ancestral seat during their visit to the UK last month, told The Mirror: 'We would love to be able to find some time to visit.'When asked whether she would swap wine-making secrets with Harry's wife Meghan Markle, 45, who launched her own rosé last July, Lady Eliza kept things open-ended when she said: 'Maybe!'