Kate Middleton rests her case for summer being all about the Little White Dress in Self-Portrait stunner

The Princess of Wales was ethereal and elegant in all-white at this year’s service after missing it last year amid her cancer treatment.

Catherine, Princess of Wales smiles as she attends the Order of the Garter service at St George's Chapel in Windsor Castle
(Image credit: Photo by YUI MOK/POOL/AFP via Getty Images)

It was wonderful to see the Princess of Wales back by Duchess Sophie’s side as they waited for the procession before the Order of the Garter service on 16th June. Unlike the King, their husbands and several other royals, including Queen Camilla, they aren’t in the order but they do still attend the service at St George’s Chapel.

Such a special occasion means pulling out the style stops and the future Queen stepped out at Windsor Castle wearing an oldie but a goodie. Her white Self Portrait tailored boucle dress has been in her collection for years and resembles a classic blazer worn over a pleated midi skirt.

The beauty of it is that it’s an all-in-one design and the textured bodice with its crisp lapels drapes over the flowing chiffon skirt underneath. Delicate lace with a scalloped hem runs along the bottom and this is one of two things about Kate’s look that surprised me.

Sophie, Duchess of Edinburgh and Catherine, Princess of Wales, attend the Order of the Garter service at St George's Chapel, Windsor Castle on June 16, 2025

(Image credit: Photo by Yui Mok - WPA Pool/Getty Images)

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Lace is one of those fabrics that can be tricky to style. I often find lace-focused designs a bit too twee, or else look too much like nightwear.

The Princess of Wales effortlessly avoided this with her midi dress, as the structure of the blazer-style bodice balanced the feminine, whimsical lace. Lace is still not something she tends to wear, though, making this dress stand out to me.

It was a subtle way to wear a sheer material and still felt modest and sophisticated. The underskirt helped with this, as did the fact that the lace was minimal.

Although a white frock isn’t going to make many people’s list of the best wedding guest dresses for obvious reasons, they do work for so many other occasions like garden parties, picnics and the races.

Catherine, Princess of Wales attends the Order of the Garter service at St George's Chapel in Windsor Castle, west of London, on June 16, 2025

(Image credit: Photo by YUI MOK/POOL/AFP via Getty Images)

Many of us get a lot of wear out of black dresses for date nights and parties and a Little White Dress is a fabulous summer alternative. They don’t have to be quite as formal as hers, either. A smart-casual outfit of a white midi dress and raffia accessories is a failsafe, and if you prefer bright bags and sandals then you have a neutral base to pair with them.

Kate’s Self Portrait dress had multiple textures to add dimension to the otherwise plain white dress, and this was a clever choice. She matched her hat to her clothes and accessorised with timeless court shoe heels in a soft beige tone.

For a comfier option, white trainers would also work but stilettos brought the sophistication we’d expect from the Order of the Garter service.

Prince William and Catherine, Princess of Wales depart the Order of the Garter service at St. George's Chapel, Windsor Castle on June 16, 2025

(Image credit: Photo by Chris Jackson/Getty Images)

These were stunning finishing touches, though the second aspect of her look that really caught my attention was her hair. The Princess used to wear her brunette tresses loose a lot but since becoming more senior within the Royal Family this has changed.

She now favours sleek up-dos for official events and occasions - as we saw a few days earlier at Trooping the Colour. Her decision to leave her hair down in loose waves was unusual and felt more relaxed. It worked with the smart white dress and softened the tailored silhouette.

This was a chic look for the service, which honours the Order of the Garter as the oldest and most senior order of chivalry in Britain.

Emma is a Royal Editor with eight years experience working in publishing. She specialises in the British Royal Family, ranging from protocol to outfits. Alongside putting her royal knowledge to good use, Emma knows all there is to know about the latest TV shows on the BBC, ITV and more. When she’s not writing about the latest royal outing or unmissable show to add to your to-watch list, Emma enjoys cooking, long walks and watching yet more crime dramas!