Published: 02:25 BST, 21 June 2017 | Updated: 07:49 BST, 21 June 2017
Then a fresh-faced kindergarten assistant, Princess Diana caused a stir in 1980 when she accidentally flashed her shapely legs in a sheer white skirt.
Almost four decades later, the Duchess of Cambridge emulated her husband's late mother with her own revealing ensemble at Royal Ascot on Tuesday.
The 35-year-old royal looked resplendent in a bespoke Alexander McQueen lace dress - which displayed the silhouette of her limbs when the sun shone behind her.
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The Duchess of Cambridge emulated Princess Diana's revealing white skirt moment in 1980 with her own sheer ensemble at Royal Ascot almost four decades later
The 35-year-old royal looked resplendent in a bespoke Alexander McQueen lace dress - which displayed the silhouette of her limbs when the sun shone behind her
The sartorial nod comes after the iconic photo emerged on a late summer day in September 1980 when Diana - then a kindergarten assistant - posed for press photos.
Expertly balancing a youngster on her hip, the Sloane Ranger looked chic in a simple maroon sweater, white lace skirt and a golden 'D' pendant necklace.
But unbeknownst to her, the young teacher - who had just started dating Prince Charles - showcased her slim figure in the skirt as the sun beamed behind her.
Just five months later, her engagement to the Prince of Wales was announced by Buckingham Palace.
Arthur Edwards, who took the photo, told the Sun: 'This was one of the first photos to make my name.
The sartorial nod comes after the iconic photo emerged on a late summer day in 1980 when Diana, then a nursery school assitant, posed for press photos
Just five months after the photo caused a stir, her engagement to the Prince of Wales was announced by Buckingham Palace. Pictured cradling a young Prince Harry in Majorca
Fast forward 37 years and Kate Middleton set tongues wagging in her own right with her semi-sheer ivory dress
Lovely in lace! Kate showed off her trim figure in bespoke Alexander McQueen, while Beatrice also opted for a summery white outfit
'Diana was a class assistant at the Young England Kindergarten in Pimlico, London, in September 1980 and I started taking photos to capture the princess-to-be at work.
'But then the sun came out and made her skirt completely see-through. The shot made the front page of The Sun and people still ask me about it today.'
Fast forward 37 years and Kate Middleton set tongues wagging in her own right with her semi-sheer ivory dress.
Despite temperatures soaring to almost 30C, Kate kept her cool in a white lace outfit by Alexander McQueen as she joined the Queen and Prince William at Royal Ascot.
The Duchess of Cambridge and Prince William steal a quite moment for a chat after the carriage procession
Carole Middleton, 62, looked incredibly youthful in a pastel blue dress from Goat, teamed with a matching hat
The Duchess of Cambridge, 35, stunned in a bespoke white lace dress by Alexander McQueen for her appearance at Royal Ascot
It was a family affair for the royals with Kate's mother Carole, 62, joining the party in the Royal Enclosure, looking elegant in a pastel blue dress by Goat.
The royals took part in the traditional procession down Ascot's straight mile which forms part of each day's racing during Royal Ascot.
The band of the Grenadier Guards played the National Anthem as the four Royal carriages travelled down the track, applauded by the crowds.
The Queen and the Duke of Edinburgh were joined in the first carriage by the Duke of York and Lord Vestey.
Kate gets a warm welcome from Zara Tindall who is godmother to her son Prince George
A picture perfect pair! Friends dressed in shades of pink and white teamed their hats with their headscarves as they arrived for the first day of Royal Ascot in Berkshire
Flanked by the Duke of Edinburgh and Johnny Weatherby, Her Majesty's Representative at Ascot, The Queen then stood in the parade ring and joined racegoers in a minute's silence to remember and pay tribute to the victims of the recent terror attacks and the fire at the Grenfell Tower.
Wearing a lime green crepe coat by Stuart Parvin and a lime green dress with a floral design, with a hat to match by Rachel Trevor Morgan, The Queen had previously taken part in the traditional Royal procession down Ascot's straight mile which forms part of each day's racing during Royal Ascot.
On Wednesday The Queen will attend the State Opening of Parliament but is expected to be at Ascot for the racing.
Sophie and Kate laugh uproariously as the Countess loses her balance and stumbles forward before being caught by Kate
The Countess of Wessex took a tumble as she stood up in the carriage, almost falling on to the Duchess of Cambridge
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