Royal Style in the Making includes the pink attire, designed by David Sassoon for Bellville Sassoon. The dress and jacket ensemble was first worn after her 1981 wedding to Charles.
It made another appearance during a Royal tour to Australia in 1982 – and at the inauguration event of a hospital in Grimsby in 1983.
Princess Diana died in a car accident in 1997 but her iconic style lives on.
Rich Simmons, lead stylist supervisor at Stitch Fix UK, described how Princess Diana’s most iconic looks can be recreated.
He told Express.co.uk: “Diana’s style has transcended through the past thirty or so years and the approachable nature of her style is now easier to achieve than ever.”
The People’s Princess often chose coloured coats and jumpers, as well as tailored suits.
Many of Diana’s outfits are easy to replicate at home as she often opted for “effortless” pieces like wide leg trousers, blouses and trainers.
Mr Simmons added: “The key aspects of Diana’s style are easy to replicate given current trends; try pleated wide leg trousers with a fitted, high-neck, puff sleeved blouse for an effortless look that can be easily dressed up with heels.
“If you’re looking for more casual attire, try boyfriend jeans from the likes of Lee Denim, a nautical striped tee and Superga trainers for an easy school run outfit.”
Princess Diana’s staple pieces included the white Superega trainers she was often seen leaving the gym wearing.
Nowadays the shoes can be found in a wide variety of colours and styles.
Kate Middleton, the Duchess of Cambridge, has previously been spotted wearing wide leg trousers and white Superga trainers, like her late mother-in-law.
Mr Simmons added: “Lastly, Diana became so well known for her bold blazers; to recreate the look this autumn, try a statement block colour blazer layered over a lightweight ribbed knit and jeans.
“The key to nailing this trend in a truly wearable way is to keep things simple, allowing fashion-forward details on the blazer to shine; try a bright coloured style, strong padding in the shoulders or an oversized cut to channel peak 80s Diana.”
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