The sisters both gave birth in 2018, with Kate Middleton giving birth to her and Prince William's third child, son Prince Louis, in April, while Pippa Middleton and James Matthews welcomed their first child, son Arthur Michael William Matthews, in October. Both ladies were known for their fashion prowess, and nothing has changed with motherhood. Click through the gallery to see their best postpartum looks.
The Duchess of Cambridge was appropriately dressed for a visit to the Scouts' headquarters in North London on March 29. Kate looked put-together but was still able to easily move around in an olive military-style coat, maroon turtleneck and black pants, which she accessorized with a striped knotted scarf and slightly heeled hiking boots.
No Gray Skies Here
For her first public solo outing with Queen Elizabeth II at King's College London on March 19, the mom of three paired a light gray belted Catherine Walker coat dress with all-black add-ons, including black tights, heels, a clutch and a Sylvia Fletcher for Lock Hatters hat.
St. Patrick's Day Celebrations
Prince William and Kate traveled to Hounslow, England, to celebrate St. Patrick's Day. The duchess looked ready for a Guinness in a forest green Alexander McQueen coat adorned with a traditional gold shamrock brooch, a green fascinator, and green tourmaline-and-amethyst drop earrings by Kiki McDonough.
Reduce, Reuse, Recycle!
The 37-year-old royal is known to recycle outfits, and glam outings are no exception. Kate looked sleek at the National Portrait Gallery Gala in London on March 12, where she rewore a black floral, tiered Alexander McQueen dress with Kiki McDonough earrings and a Prada clutch.
Kate looked ready to get down to business in a lilac pussy-bow blouse, black wide-legged trousers and a mini pastel bag when she visited the Henry Fawcett Children's Centre in London on March 12.
We couldn't take our eyes off the Duchess of Cambridge as she attended Commonwealth Day services on March 11. She looked radiant in a crimson Catherine Walker coat that featured two rows of gold buttons down the front and a sharp collar, which she paired with a matching hat and tan suede clutch and Emmy London heels. She wore the same look in New Zealand back in 2014.
Green With Envy
Kate knows she looks good in green! The duchess was all smiles while meeting the public on the Comedy Carpet after visiting Blackpool Tower in Blackpool, England, on March 6. For the fun day, she topped an all-black ensemble with a long, hunter green coat by Sportmax and added an alligator-hued suede Manu Atelier bag and drop earrings for good measure.
The brunette beauty looked prim and proper in a light blue belted coat-dress by Mulberry that included a unique small cape while visiting Ballymena, Northern Ireland, on Feb. 28. She wore her hair down and opted for light makeup, with dark blue suede pumps and sapphire earrings adding plenty of flair. Bonus? Royal fans thought this look gave off major Harry Potter vibes!
Flirty and Fun
For her first post-baby public outing, Pippa opted to go bold, donning a pretty, colorful maxi dress by Temperley London for the Beating Hearts Ball in London on Feb. 27. The gown featured a black bow at the neck and a belt, plus fluttered, tiered sleeves. She added a bold red clutch, which brought out a similar crimson hue in the frock and wore her hair pulled back.
Kate glowed in a subtly sparkly mint green Missoni dress with a plunging neckline for an evening at the Empire Music Hall in Belfast, Northern Ireland, on Feb. 27. She accessorized with a nude clutch and matching pumps.
Perfect in Pastels
Kate stunned at the 100 Women in Finance Gala Dinner in London on Feb. 13. The blushing babe wore a romantic Gucci gown in various pale pink shades, matching a dark rosy velvet Prada clutch to the dress' belt and adding some sparkle with fancy pear-shaped earrings.
The duchess looked prim and proper at a Mental Health in Education conference that same day, suiting up in a dark gray, tweed jacket-and-skirt combo by Dolce & Gabbana and all-black accessories, including Tod's pumps and a Mulberry clutch.
The gorgeous mama made a major statement at the 2019 BAFTA Awards on Feb. 10, pairing a dreamy one-shouldered white dress with a pair of the late Princess Diana's earrings and silver, glittery Jimmy Choo heels.
Kate donned a vintage-feeling kelly green Eponine smock dress with black tights and heeled booties for a visit to the Alperton Community School in London on Feb. 5.
Mad for Plaid
Kate made plaid look perfect, recycling a navy blue-and-forest green coat with a mini green purse by MANU Atelier and sapphire-and-diamond drop earrings at the opening of the V&A Dundee museum in Scotland on Jan. 29. She finished off her look with black stockings, gloves and heels.
The mom of three looked pretty in bright purple while visiting the Royal Opera House's Costume Department in London on Jan. 16, choosing a skirted suit by Oscar de la Renta and all-black accessories, including shiny Rupert Sanderson heels, for the occasion.
Kate opted for crimson hues from head-to-toe, looking festive in a scarlet coatdress and burgundy accessories for Christmas 2018 services with the whole royal family in King's Lynn, England.
Polka Dot Perfection
The Duchess of Cambridge looked super chic in an emerald-hued, midi-length L.K. Bennett polka dot dress, which featured classic buttons down the chest, fitted cuffs and a pussy-bow neckline, while visiting the Evelina London Children's Hospital in London on Dec. 11.
Kate opted for classic separates while helping open the Oasis Centre on the Akrotiri Royal Air Force Base in Cyprus on Dec. 5. She layered a white tee and black flares with an olive green blazer and black belt, finishing off her look with a half-up 'do.
Pippa and her husband, James, left carol services at St. Luke's Church in London on Dec. 4 walking hand in hand. The new mom kept warm in a knee-length maroon coat with a burgundy fur collar, black tights, black pumps and a cross-body bag.
The Duchess of Cambridge showed us how it's done when it comes to holiday party dressing. She looked festive and chic in a black buttoned-up Brora cardigan, plaid Emilia Wickstead maxi dress and knee-high black boots as she and husband Prince William hosted a Christmas party for families of military personnel deployed in Cyprus at Kensington Palace on Dec. 4.
Cruising in Crimson
Take a lesson in how to look fabulous from Kate! The stunning royal paired a maroon blazer-and-flared skirt combo by Paule Ka with a black turtleneck, tights and suede Tod's heels for a stop at University College London on Nov. 21. She's a big fan of this suit, too, having previously worn it for engagements in 2012 and 2017.
Got the Blues
Kate showed off her fashion prowess while chatting with her husband at the BBC Broadcasting House in London on Nov. 15. She looked lovely in a turquoise Emilia Wickstead dress with a boxy neckline and pleated skirt, keeping her accessories simple with black L.J. Bennet heels, jeweled earrings and her engagement ring.
Forest green was the hue that once again took center stage when Kate stepped out for a service at Westminster Abbey on Nov. 11 that marked the centenary of the World War I armistice. She paired the fitted Catherine Walker coat, which included gold buttons and velvet accents, with a black beret, metallic clutch. sheer stockings, black pumps and a poppy pin, a remembrance symbol.
The Duchess of Cambridge wowed at the Tusk Conservation Awards in London on Nov. 8 in a beloved, belted teal gown by Jenny Peckham, which featured layers of chiffon and subtle lace detailing along the short sleeves and bodice. She finished her look with a matching clutch and loose waves.
A Royal in Royal
Retro business vibes! Kate's slim figure took center stage when she visited the Imperial War Museum in London on Oct. 31, where she wore a royal blue Jenny Packham midi dress with flared sleeves and a pencil skirt. She accessorized with a nude-hued clutch and heels.
Between the asymmetrical neckline, bold burgundy belt and flared skirt, we can't get enough of this unique gray plaid Erdem dress that the mom of three wore to the opening of V&A Photography Centre at London's Victoria & Albert Museum on Oct. 10. As for accessories, she played off the belt's hue in both her clutch and pumps.
Lovely in Lilac
Kate was pure pastel perfection at the Global Ministerial Mental Health Summit in London on Oct. 9, brightening up the day in a fitted, long-sleeved lavender dress by Emilia Wickstead, a simple silver necklace, pastel mini bag and nude heels.
Back to Work!
For her first public post-maternity appearance, the Duchess of Cambridge layered up in fall neutrals, topping a gray sweater and skinny tan pants with a dusty green zip-up jacket for a visit to the Sayers Croft Forest School and Wildlife garden in London on Oct. 2. For footwear, she opted for her trusty tasseled knee-high cognac boots by Penelope Chilvers.
Time for Tennis
It was impossible to miss the duchess at Wimbledon! Kate looked anything but mellow yellow in a bright canary-hued Brandon Maxwell dress with fluttery cap sleeves as she and Prince William watched the Men's Singles finals in London on July 15.
Ruched and Ready
One day earlier, Kate watched Serena Williams' Wimbledon match against German tennis player Angelique Kerber in London with her sister-in-law, Meghan Markle, their first joint solo appearance together. In a look fit for the perfect summer outing, the third-time new mom chose a white polka dot Jenny Packham dress with ruched detailing, a silver watch, pearl-drop earrings and a tan handbag.
The duchess paired a pale blue dress by Alexander McQueen with a matching Sean Barrett hat and nude pumps for at a Buckingham Palace ceremony marking the centenary of the Royal Air Force on July 10. She accessorized with a pastel clutch in the same hue as well as a RAF Dacre brooch.
Kate opted for a white Alexander McQueen dress, matching Jane Taylor flower-adorned headband and pearl earrings for son Prince Louis' christening on July 9.
The Duchess of Cambridge was sitting pretty with daughter Charlotte at the Maserati Royal Charity Polo Trophy at Beaufort Polo Club in Glouster, England, on June 10. For the fun summer outing, Kate chose a breathable, preppy blue-and-white striped Zara dress and espadrilles.
Kate was all about pastel hues after welcoming little Louis! At her first Trooping the Colour parade as a mom of three, the duchess stuck to her love of light blue, pairing an Alexander McQueen dress with puffy shoulders with a matching clutch and Juliette Botterill hat.
Ready for a Wedding
First Post-Pregnancy Look
Welcome to the world, Prince Louis! William and Kate introduced their newborn son to the world just hours after his birth on April 23. For her first post-pregnancy look, the now-mother of three glowed in a bright red dress, custom Jenny Packham dress with a white lace peter pan collar and nude Gianvito Rossi heels.