The Duchess of Cambridge seemingly sought sartorial inspiration from Princess Diana on the Lindo Wing steps. The 36-year-old donned a poppy red dress by Jenny Packham (a label she’s looked to for each hospital photocall), as the royal couple presented their third child to the world. [Photo: Getty]

The Duchess of Cambridge made a surprise appearance at the Easter Sunday service at St George’s Chapel alongside senior members of the royal family. For the ceremony, the 36-year-old wore one of her go-to maternity looks. She donned a Catherine Walker coat dress she debuted back in 2012 on St Patrick’s Day. She accessorised the look with a co-ordinating Lock & Co hat. [Photo: Getty]

The Duke and Duchess of Cambridge attended a SportsAid event at Olympic Park in Stratford on 22 March. The event marked the 36-year-old’s final engagement before preparing to welcome baby number three. For the occasion, the royal donned skinny jeans and her go-to coat by Goat.
Oh, and if you’re hoping to get your hands on her Hobbs blouse, it’s just landed in the sale… [Photo: Getty]

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

For the annual Irish Guards St Patrick’s Day Parade, the Duchess of Cambridge dressed her blossoming baby bump in emerald green. The 36-year-old chose a Catherine Walker coat accessorised with faux fur cuffs and collar by Gina Foster which she first donned back in 2013. [Photo: Getty]

On March 7th, the Duchess of Cambridge opened the new Place2B Headquarters in London in one of her favourite maternity looks.
The royal dressed her bump in a £165 lace dress by Seraphine which she first donned while dining with the Norwegian royals during the Duke and Duchess of Cambridge’s Scandinavian tour. [Photo: Getty]

The Duchess looked typically stylish in a £69 cream JoJo Maman Bebe maternity coat, she’d previously worn on a visit to the set of Downton Abbey when she was pregnant wih Princess Charlotte. She kept her accessories simple with classic brown court shoes and a matching clutch.

The Duchess was visiting Pegasus primary school in Oxford to learn about how the charity Family Links had helped pupils and their families through emotional health and wellbeing issues. [Photo: Getty]

The Duchess returned to one of her favourite maternity brand’s Seraphine with this vivd blue, empire line dress to mark the first joint engagement with her soon-to-be sister in law Meghan Markle. The £99 knee-length dress showcased the Duchess growing bump beautifully. Unsurprisingly it is now sold out online. [Photo: Getty]

The royal accepted a role role as the Patron of the Royal College of Obstetricians and Gynaecologists, a role previously held by the Queen Mother, wearing a Jackie O-style Jenny Packham bespoke coat (Getty Images)

The Duchess of Cambridge donned a monochrome floral dress by Erdem for The Commonwealth Fashion Exchange Reception at Buckingham Palace on February 19th. She accessorised the look with her go-to Prada wavy-cut heels. [Photo: Getty]

To celebrate her first evening in Norway with Prince William, the Duchess of Cambridge donned a cape gown by Alexander McQueen. She accessorised the look with jewels borrowed from Her Majesty and a sparkly Jimmy Choo clutch. [Photo: Getty]

For the second stint of the royal tour, the Duchess of Cambridge donned a blue Catherine Walker coat accessorised with faux fur cuffs and a co-ordinating hat. [Photo: Getty]

The Duchess of Cambridge donned a velvet Erdem gown for her final night in Sweden and the look cost a cool £2,690.
She accessorised the midi dress with a pair of earrings by Robinson Pelham and Gianvito Rossi heels. [Photo: Getty]

To mark their first day in Stockholm, the Duchess of Cambridge changed into an emerald-hued coat by Catherine Walker and accessorised the look with an £895 Mini Seaton Black Bag from Mulberry. [Photo: Getty]

The Duchess of Cambridge donned a shearling coat by Burberry with Sorel snow boots for the first day in Stockholm. She finished the look with a burgundy jumper by Swedish label, Fjällräven and a faux fur bobble hat from Eugenia Kim (FYI, it sold out instantly). [Photo: Getty]

On 24th January, the Duchess of Cambridge visited King’s College London and donned all-blue for the a second royal engagement running. Kate recycled a powder blue Seraphine coat for the occasion with a floral dress by the same brand (which she has worn three times in total).
She acccesorised the look with co-ordinating suede shoes and a quilted clutch. [Photo: Getty]

On January 23rd, the Duchess of Cambridge recycled a powder blue coat by Sportmax for a visit to Roe Green Primary School.
Kate Middleton first donned the look back in 2015 when expecting Princess Charlotte. She accessorised the look with Rupert Sanderson court shoes and a £95 printed scarf by Beulah London. [Photo: Getty]

The Duchess of Cambridge dressed her baby bump in a monochrome tracksuit on a recent trip to Bond Primary School in Mitcham.
Kate Middleton chose a £120 white jacket by Clarice and accessorised the sports-luxe aesthetic with a pair of Nike trainers. [Photo: Getty]

Kate Middleton donned a £220 Boden coat on a recent visit to Great Ormond Street Hospital. [Photo: Getty]

The Duke and Duchess of Cambridge marked their first joint royal engagement of 2018 with a trip to Coventry Cathedral. For the momentous occasion, Kate Middleton donned her go-to Mulberry coat which she has worn throughout all three of her pregnancies.
The 36-year-old last wore the number back in March 2015 while pregnant with Princess Charlotte. [Photo: Getty]

On January 10th 2018, the Duchess of Cambridge kick-started her official royal duties with a visit to the Reach Academy Feltham. For the momentous occasion, Kate Middleton donned a blue coat by Hobbs over a £65 maternity dress by Seraphine. Though it isn’t the first time the royal has donned the look, as she first wore the dress while pregnant with Princess Charlotte. [Photo: Getty]

Kate Middleton joined the Duke of Cambridge and his grandfather the Duke of Edinburgh for church service on Sunday 7 January, 2018. For the outing, the Duchess of Cambridge donned a tweed knee-skimming coat accessorised with her go-to burgundy Chanel bag. [Photo: Getty]

For the 2017 Royal Variety Performance, the Duchess of Cambridge dressed her blossoming bump in a sky blue gown by Jenny Packham.
She accessorised the look with glittery heels by Oscar de la Renta and a box clutch. [Photo: Getty]

Kate Middleton attended the Royal Festival of Remembrance on 11 November, 2017.
The Duchess of Cambridge dressed her blossoming baby bump in a velvet Catherine Walker coat for the ceremony complete with Swarovski buttons. [Photo: Getyy]

On 8 November 2017, Kate Middleton attended the Place2Be School Leader’s Forum in London wearing a plum-hued tunic dress by Goat.
The £480 number sold out in just two days. [Photo: Getty]

The Duchess of Cambridge proved she’s a thrifty royal on 7 November, as she brought back a Diane Von Furstenberg dress for the 2017 Gala Dinner for The Anna Freud National Centre for Children and Families.

She first donned the gown at the 2014 Royal Variety Performance. [Photo: Getty]

On October 31, the Duchess of Cambridge visited the Lawn Tennis Association in Monreal London trackpants and Nike Air VaporMax trainers. [Photo: Getty]

Kate proved she’s a fan of Philosophy di Lorenzo Serafini, as she now owns two of the brand’s cult blazers. This time, the Duchess of Cambridge donned a powder blue version at the London Stadium. [Photo: Getty]

On October 16, Kate donned a peach-hued lace dress by Orla Kiely to dance with Paddington Bear. [Photo: Getty]

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

Kate Middleton attended the St Patrick’s Day Parade on March 17, 2015. Pregnant with Princess Charlotte, Kate dressed her bump in a Catherine Walker coat. [Photo: Getty]

Kate donned a Beullah navy coat to co-ordinate with husband Prince William’s look in March 2015. The couple attended the Service of Commemoration for troops who were stationed in Afghanistan. [Photo: Getty]

Kate visited the set of Downton Abbey in a cream Jojo Maman Bebe coat finished with black co-ordinating accessories. [Photo: Getty]

On March 11, 2015 Kate Middleton visited the Turner gallery in Margate decked in a leopard print coat by Hobbs. The Duchess of Cambridge accessorised the look with a black Mulberry clutch. [Photo: Getty]

Pregnant with Princess Charlotte, the Duchess of Cambridge attended the 2014 Royal Variety Performance in a lace gown by Diane Von Furstenberg. [Photo: Getty]

On November 8, the Duke and Duchess of Cambridge visited Pembroke, Wales. Kate dressed her bump in a powder blue military-inspired coat by Mathew Williamson and finished the look with knee-high boots and a black clutch. [Photo: Getty]

Kate chose a Jenny Packham peach-hued number for the 60th anniversary of the Queen’s Coronation in June, 2013. [Photo: Getty]

Kate wore a sunny yellow coat by Emilia Wickstead for the Queen’s garden party at Buckingham Palace in May 2013. [Photo: Getty]

Kate sought inspiration from the Queen when she visited Naomi House, as she donned a peach-hued coat by Tara Jarmon with a co-ordinating dress. [Photo: Getty]

Kate visited the Warner Bros. studios in April 2013 in a polka-dot dress by Topshop. She accessorised the look with co-ordinating monochrome accessories. [Photo: Getty]

In April 2013, the Duchess of Cambridge visited the Art Room at the National Portrait Gallery in a sleeveless dress by Emilia Wickstead. [Photo: Getty]

Kate donned a bouclé-effect coat by Mulberry for The National Review of Queen’s Scouts in April, 2013. She accessorised the look with taupe heels by LK Bennett. [Photo: Getty]

Kate Middleton visited Scotland in April 2013 and for the occasion, dressed in a checked coat by Moloh. [Photo: Getty]

The Duchess of Cambridge celebrated St Patrick’s Day in 2013 in a forest green coat by Emilia Wickstead. [Photo: Getty]

On a visit to Grimsby, Kate recycled her £369 Hobbs coat from the previous year. She teamed the chestnut-hued number with a dress by London-based label, Great Plains. [Photo: Getty]