Lady Kitty Spencer's wedding dress is one for the books.

Princess Diana's niece stunned in a gorgeous wedding dress, designed by Dolce & Gabbana, in a photo shared Sunday by the Italian designer on Instagram.

Sharing a video clip of the bride trying on the different looks, Dolce & Gabbana wrote in the caption that the exclusive hand-made gowns celebrated the "beauty of the bride" and the "passion for #AltaModa and the absolute joy of the occasion." .

"The most beautiful bride and wedding," she captioned the photo of the bride in her Dolce & Gabbana wedding dress

A day before Dolce & Gabbana shared photos of her wedding dress to social media, Lady Kitty posted a photo of herself outside of the Piazza del Duomo in Florence, Italy