Princess Diana's model niece Kitty Spencer looks gorgeous at the royal wedding

Subtle details are paying tribute to Prince Harry’s late mother, Princess Diana, at the royal wedding, and her family — including her brother Charles, the Earl of Spencer, and sister Lady Jane Fellowes — are playing important roles.

But Lady Kitty Spencer, Diana’s niece — who doesn’t have an official role in the festivities — really stands out.

The 27-year-old, who has worked as a model, starred in a Dolce & Gabbana ad campaign, and walked in the Italian brand’s runway show in February, looked stunning in an emerald green dress covered in flowers from the company. She wore orange satin heels and a green fascinator designed by Philip Treacy featuring a handblocked teardrop veil with a hand-sculpted knot parasisal, with a feather quill and spines as well as Swarovski crystals.

Lady Spencer also wore a diamond necklace.

Want to learn more? Here are seven things you didn’t know about Lady Kitty Spencer:

For all things royal wedding, from details on Meghan Markle’s dress to cute pictures of Prince George and Princess Charlotte, click here. Want to relive every moment? Watch it all here.