It’s natural that Lady Kitty Spencer and her twin sisters , Lady Amelia and Lady Eliza Spencer , are often compared to their late aunt, Princess Diana —but that doesn’t mean everything they wear is a deliberate tribute. Diana might’ve worn an off-the-shoulder red gown in 1992, but Kitty stepped out in a version that was all her own at the British Museum Ball on October 18.

Earl Spencer’s eldest daughter, 35, wore a bold Dolce & Gabbana Alta Moda dress along with a dramatic matching cape as she posed outside the London-based museum. Like the dress Diana wore, Kitty's satin design featured an off-the-shoulder neckline, but the comparisons to the late royal end there.

Lady Kitty Spencer wears a Dolce & Gabbana Alta Moda gown at the British Museum Ball on October 18.

(Image credit: Getty Images)

Spencer wears a statement necklace by Chatila Jewels.

(Image credit: Getty Images)

Kitty accented her outfit with a massive diamond necklace by Chatila Jewels—a move jewelry expert Nilesh Rakholia calls "a…