
On Sunday the 26th of September 2020, Kensington Palace released a photograph of William, Kate and their children with Sir David Attenborough. In the pictures, Kate wore a blue denim shirt dress by Uruguayan designer Gabriela Hearst. It’s the designer’s Marley style dress.

About the Gabriela Hearst Marley dress:
Cut from cotton-chambray fabric, the Marley shirt dress features a pointed collar and a mid-length flared skirt. The rolled-up sleeves are adjustable and can be fastened with push-stud cuff strips. A thin belt sits at the waist and closes with a silver-coloured lobster clasp.
[The] ‘Marley’ midi dress is tailored to look like classic shirting and has a flouncy skirt that’s punctuated with mother-of-pearl snaps – undo a few to create a splitNET-A-PORTER
I have found at least three different iterations of the Marley dress in denim. I believe Kate is wearing this darker blue style from the designer’s Pre-Fall 2020 collection.
An embroidered version of the dress featured in the Spring Summer 2018 collection. It has “simply drawn birds” embroidered in navy blue across the torso.
A third, lighter denim version was released at some point too.
About Gabriela Hearst:
Sustainability, a refined aesthetic, beautiful tailoring and only the best materials are at the heart of Gabriela Hearst’s luxury clothing collection.
I wanted to work with the best materials in the world; I wanted sustainability to inform all our decision-making.
Gabriela Hearst via The Times
Anna Murphy, the Fashion Director at The Times describes Gabriela Hearst as “the women who dresses the 1%”. Anne Hathaway, Amal Clooney, Queen Rania of Jordan and Melania Trump are just a handful of Hearst’s high-profile clients.