From Princess Diana to the Duchess of Cambridge: We chart the best royal maternity looks of all time

1/14
Queen Elizabeth II

Queen Elizabeth II was one of the first leading royals to demonstrate the art of regal maternity dressing. Here, Her Majesty is pictured arriving at the Covent Garden Royal Opera House for a ballet performance back in November 1963. She was expecting Prince Edward at the time. [Photo: Getty]

2/14
Princess Anne

Who could forget Princess Anne’s seriously chic maternity wardrobe? Here, the royal is pictured on a trip to West Yorkshire back in November 1977. She was expecting her first child, Peter Phillips, at the time. [Photo: Getty]

3/14
Princess Anne

In May 1981, Princess Anne and her then-husband Mark Phillips attended a close friend’s wedding. For the outing, Princess Anne dressed her bump in a Pinterest-worthy cape coat and ’80’s style headscarf. She was expecting daughter Zara Tindall at the time. [Photo: Getty]

4/14
Princess Diana

Back in March 1982, Princess Diana demonstrated how to tackle red carpet maternity dressing in a vivid red David Sassoon gown for a trip to the Barbican in London. She was expecting Prince William at the time. [Photo: Getty]

5/14
Princess Diana

Proving that she knows how to tackle off-duty maternity dressing, Princess Diana chose a millennial pink oversized dress for a trip to the polo back in May 1982. [Photo: Getty]

6/14
Princess Diana

Princess Diana was photographed at the polo with Sarah Ferguson once more in a polka dot dress by Catherine Walker back in June 1982. [Photo: Getty]

7/14
Princess Diana

We challenge you to find a greater maternity look. Princess Diana chose a froth candy floss-hued dress back June 1982 for another trip to the polo just weeks before welcoming Prince William. [Photo: Getty]

8/14
Sarah Ferguson

Sarah Ferguson has never been one to stick to the royal dress code and here, she dressed her baby bump in a midi dress back in July 1988. She was expecting her first child, Princess Beatrice, at the time. [Photo: Getty]

9/14
Sarah Ferguson

Sarah Ferguson gave lessons in off-duty maternity dressing while pregnant with Princess Eugenie. Here, she is pictured at a ski event back in February, 1990 and we’re obsessed with the retro aviator jacket. Name a more iconic look… We’re waiting. [Photo: Getty]

10/14
The Duchess of Cambridge

For her first pregnancy, the Duchess of Cambridge gave lessons in the art of high street maternity dressing. For a trip to the Warner Bros. studios back in March 2013, she wore a polka dot number by Topshop. The royal was expecting Prince George at the time. [Photo: Getty]

11/14
The Duchess of Cambridge

In March 2015, the Duchess of Cambridge visited the set of Downton Abbey in a cream Jojo Maman Bebe coat with a Mulberry clutch to hand. She was expecting Princess Charlotte at the time. [Photo: Getty]

12/14
The Duchess of Cambridge

The Duchess of Cambridge made her first public appearance after announcing that she was pregnant with her third child at a Buckingham Palace function on October 10. She opted for a blue lace dress by Temperley London known as the ‘Eclipse’. [Photo: Getty]

13/14
The Duchess of Cambridge

The Duke and Duchess of Cambridge’s Scandinavian royal tour proved the perfect opportunity to demonstrate the art of regal maternity dressing. For a trip to Stockholm, the Duchess dressed her bump in a houndstooth coat dress by Catherine Walker and finished the look with a Chanel bag. [Photo: Getty]

14/14
The Duchess of Cambridge

For one of her final royal engagements before welcoming Prince Louis, the Duchess of Cambridge donned a spring-ready mint Jenny Packham ensemble. She accessorised the look with a co-ordinating Loeffler Randall clutch and Gianvito Rossi heels. [Photo: Getty]

The royal family has long reigned the fashion industry with every tiara and wedding gown plastered across the history books.

But no protocol-breaking outfit or diplomatic suit could top every female member of the Windsor clan’s most covetable superpower: the art of regal maternity dressing.

Whether it’s Princess Diana’s now-famous penchant for nautical stripes or the Duchess of Cambridge‘s sell-out wardrobe, the royals sure know how to tackle pregnancy style.

With news that the Duke and Duchess of Sussex are expecting their first child, we revisit some of the greatest royal maternity looks of all time.

Follow us on Instagram and Facebook for non-stop inspiration delivered fresh to your feed, every day. For Twitter updates, follow @YahooStyleUK.

Read more from Yahoo Style UK:

Harry and Meghan expecting their first child

What Harry and Meghan might name their baby

Fans speculate whether Meghan’s pregnant at Eugenie’s wedding

Harry and Meghan touch down in Sydney