Royal blue: The Duchess of Cambridge leaves the King Edward VII hospital in a Diane Von Furstenberg coat following treatment for acute morning sickness
Whatever the Duchess of Cambridge wears turns to gold.
From that Zara cornflower blue dress to those vibrant pink jeans and her exquisite Sarah Burton wedding gown, her sartorial selections have sent high-street and designer sales soaring as women try desperately to emulate her impeccable style.
Whether striking in bright red Alexander McQueen during the Queen's Diamond Jubilee pageant, or dressed down in Le Chameau wellies and a campfire-chic gilet while on a forest outing with inner-city children, Kate's wardrobe choices are consistently classic, carefully considered, polished and chic.
This year she has been both elegant in a plunging emerald Jenny Packham gown at the Royal Albert Hall, and supportive of the 2012 London Olympic Games by sporting a £49,000 Cartier gold hoop necklace.
We have seen her dressing demurely and respectfully when visiting temples during her tour of the South Pacific with the Duke, and casually while taking strolls along the Anglesey beach with the couple's spaniel, Lupo.
She has opted to wear designs by 'King of the dress' Roland Mouret, Canadian London-based dress-maker Erdem, Burberry, Issa, Alice Temperley, Reiss and LK Bennett.
And on tours with her husband she has gratefully worn garments gifted to her by designers from countries including the Solomon Islands and Singapore.
Even when emerging from hospital for the first time following the announcement of her pregnancy after a bout of severe morning sickness, the Duchess' navy Diane Von Furstenberg coat, cosy tights and strategically placed bouquet of yellow roses demonstrated that even when she's not feeling her best Kate still has the ability to charm us all.
And with the arrival of the Royal Bump, 2013 promises to be a year in which Prince William's wife will continue to delight and surprise us with a brand new assortment of fashion choices.
Designers are already putting pen to paper accepting the challenge of creating maternity wear fit for a future queen.
How the Duchess chooses to dress during her pregnancy - not to mention how she chooses to style herself and her baby once the little boy or girl arrives in the summer - will set trends for expectant mothers and new parents everywhere.
So today, in honour of Kate's 31st birthday, which Kate is said to be celebrating quietly with William, FEMAIL have taken a look back at 31 looks with which she dazzled the world...
Thighs the limit: The Duchess of Cambridge wore a dazzling emerald green dress and Kiki McDonough earrings to present Lord Sebastian Coe with the Lifetime Achievement Award during the BBC Sports Personality of the Year Awards
Bangs: When Kate arrived at a reception at the Natural History Museum with a newly cut fringe and a £1,400 emerald green silk pleated 'Cabbage' dress by Mulberry - she caught the world's attention
A twist of tartan: Kate glowed in an Alexander McQueen coat playing hockey on a visit to her old prep school, St Andrew's School in Pangbourne - whose own uniform is uncannily similar
Lady in red: The Duchess of Cambridge glowed in a burgundy wool double-breasted skirt suit by French label Paule Ka during her visit to the Middle Temple in London
Racy lacy: This black lace Alice Temperley dress, previously worn to the premiere of War Horse, stunned guests at a reception and dinner in aid of the University of St Andrews 600th Anniversary Appeal
Mellow yellow: The Duchess of Cambridge bade farewell to the Solomon Islands before departing for Tuvalu in this demure yellow dress, made by an independent dress-maker and Kiki McDonough earrings
Orchid delight: On the first day of the tour at an orchid garden in Singapore, the Duchess wore pale orchids of her own on this kimono-style Jenny Packham floral dress, paired with £195 LK Bennett heels
Indian prints: To meet the President of the Republic of Singapore, she opted for this print dress by Indian designer Prabal Gurung with £450 Anya Hindmarch Bespoke Maud clutch bag and £390 Prada heels
Canary yellow: Kate wore this vibrant, sun-yellow £180 Jaeger dress during her Solomon Islands tour, with a traditional beaded 'Princess Kate' necklace given to her by the country's Prime Minister
Diamond bright: Kate dazzled in a £5,000 Alexander McQueen gown teamed with a £180 Wilbur & Gussie clutch and £420 bracelet and £80 earrings by Catherine Zoraida at myflashtrash.com
All white: Looking lovely in a £1,300 Anglaise suit by Alexander McQueen, with £245 Coco wedges (sister Pippa also owns a pair) and matching £245 clutch, both from Russell & Bromley
Pretty lace: In Kuala Lumpur (and still in her favourite nude LK Bennett heels) Kate wears this delicate blue and white dress by one of her favourite designers, Alice Temperley
Respectfully demure: The Duchess wore an £895 ivory Beulah buttoned dress with a matching headscarf - and later removed her shoes - to visit a mosque in Kuala Lumpur
Upcycling: Kate first wore this beige coat dress by Danish label DAY Birger et Mikkelsenat a 2006 wedding, and here at the Olympic stadium before the Paralympic Games opening ceremony
Electric blue: Kate showed support for British designer Stella McCartney and the London 2012 Games in this blue dress and Olympic hoop necklace at the National Portrait Gallery
Lady in red: Kate's bold dress and hat charmed the adoring crowds lining the Thames as she stood on the royal barge 'Spirit of Chartwell' during the Thames Diamond Jubilee Pageant
A touch of tartan: The Duchess added a subtle Scottish slant to her ensemble with a Strathearn tartan scarf at St Giles Cathedral after the Thistle Ceremony in Edinburgh
Chocolate brown: The Duchess of Cambridge looked classic in a brown coat and Kiki McDonough earrings at The Brink, an alcohol free bar, in Liverpool where she met admirers on Valentine's Day
White out: Kate looked glamorously smart during the procession of The Most Noble Order of the Garter, at Windsor Castle
Pretty in pink: Kate's pleated pink dress and matching hat was a hit at a garden party at Buckingham Palace
Country cool: Kate looked country chic whilst visiting 'Expanding Horizons' Primary school camp taking part in various outdoor activities
Just peachy: Kate looked lovely in peach hues as she attended a reception at Guildhall in central London for Queen Elizabeth II's Diamond Jubilee
Teal lady: Kate wowed as she arrived for a British Olympic Team GB gala event at the Royal Albert Hall in a Jenny Packham dress
Designer: Kate wore this flattering gown by 'King of the dress' Roland Mouret to Claridges which she teamed with eye-catching jewellery
Royal blue: For her very public departure following the Royal wedding, Kate chose a £49.99 cornflower blue dress from Zara, which sold out instantly
Favourite label: Kate wears Sarah Burton for Alexander McQueen for the evening celebrations following her wedding to Prince William earlier
Power of pink: When she wore pink jeans to play with the GB hockey teams, they become a sell-out
Glitz and glam: The Duchess of Cambridge arrive for ARK charity gala in a dazzling Jenny Packham gown
Lilac lady: Catherine wore a lilac Alexander McQueen gown at the BAFTA Brits To Watch event
Big news: To announce her engagement to Prince William, Kate wore this £385 blue Issa wrap dress. This firmly cemented her favourite brand and the rest of the world caught on too
Royal approval: The former Kate Middleton modelled this see-through dress on the catwalk at a St. Andrew's student fashion show in 2002 which was said to have caught William's eye. It was later auctioned for £78,000
31 THINGS YOU MAY NOT KNOW ABOUT OUR FUTURE QUEEN...
1 Catherine Elizabeth Middleton was born to parents Michael and Carole Middleton at the Royal Berkshire Hospital in Reading on January 9 1982.
Kate met her future husband at St Andrews - a university where graduates have around a one in 10 chance of meeting their perfect partner and getting married
2 Kate was christened at the parish church of St Andrew's Bradfield in Berkshire on June 20 1982.
3 Aged eight, she became a brownie with the 1st St Andrews pack in Pangbourne, Berkshire.
4 At the age of 13, she went to the £15,000-a-year Marlborough College in Wiltshire.
5 During her time there she represented the college at tennis, hockey and netball. She became captain of the college's hockey team and played in the first pair at tennis.
6 Kate is a keen photographer and took pictures for her parents' mail order business Party Pieces.
7 Amman, the capital of Jordan, was home to Kate and her family for a few years in the mid 1980s.
8 The Duchess has completed her Duke of Edinburgh Gold Award.
9 Hobbies she enjoys include walking, tennis, swimming, sailing, and painting.
10 It was rumoured that at Marlborough College Kate had a poster of her future husband William on her wall. But she has quashed speculation by revealing it was in fact the "Levi's guy" who adorned her bedroom.
11 Kate spent time studying at the British Institute in Florence during a gap year.
12 She also crewed on Round the World Challenge boats in the Solent while taking a break from studies.
13 In 2001, the Duchess enrolled at the University of St Andrews, Fife, from where she graduated in 2005 with a 2:1 in history of art.
14 When an undergraduate she continued playing sports and turned out for the university's hockey team.
15 Kate met her future husband at St Andrews - a university where graduates have around a one in 10 chance of meeting their perfect partner and getting married.
16 The Duchess worked in London as a part-time buyer for the clothing company Jigsaw Junior. When she left without finding a new job, she earned the nickname 'Waity Katie' - despite the fact she was known to help her parents with their party supplies business.
17 Kate and William's first official event together after they got engaged was at Anglesey last February - dedicating a new RNLI lifeboat.
18 Kate followed wedding tradition, and for 'something blue' had a blue ribbon sewn into the interior of her dress.
It was rumoured that at Marlborough College Kate had a poster of her future husband William on her wall but she maintains it was the 'Levi's jeans guy'
19 After the wedding ceremony, on April 29 last year, her bouquet was placed on the Grave of the Unknown Warrior at Westminster Abbey after the service, continuing a tradition started by the late Queen Mother.
20 The see-through dress which sparked William's interest in Kate when she wore it at a university fashion show in 2002 was auctioned in 2011 for £78,000.
21 The Duchess is descended from a family of solicitors and landed gentry on her father's side and butchers, plasterers, road sweepers and domestic servants on her mother's.
22 During her tour of California and Canada during the summer of 2011 she wore more than 25 outfits, winning her accolades from the world's fashion press.
23 Whenever she is photographed wearing high street fashion the garment quickly sells out - one Reiss dress, the Shola bandage dress, sold at a rate of one a minute after Kate was pictured wearing it. As such, Kate has widely been credited with reviving flagging interest in the British high street, transforming the fortunes of her favoured brands such as Zara and Reiss.
24 The Duchess is an official ambassador for Team GB and Paralympic GB.
25 With her husband William she will travel to Malaysia, Singapore, Solomon Islands and Tuvalu to mark the Queen's Diamond Jubilee last year.
26 When in the capital Kate sometimes uses the London bike hire scheme - and London Mayor Boris Johnson gave Kate and William a tandem Boris bike as a wedding present.
27 She is patron of Action on Addiction and the National Portrait Gallery, and royal patron of East Anglia's Children's Hospices and The Art Room. She is also a volunteer with the Scout Association and in the future will join activities privately with groups in north Wales and other areas.
28 Although Kate could have a private chef at her disposal, she prefers to do the majority of the cooking for herself and William, and is often spotted shopping at Waitrose on Anglesely and, when she is at Kensington Palace, at the Waitrose on Kensington High Street. Kate even surprised shoppers at Tesco last month when she shopped at the supermarket, stocking up on essentials including Kellogg's Special K and she and William were reported to have been seen buying pizza, chips and salad in their local supermarket in North Wales.
29 Kate is not allergic to horses, as has been widely reported. At last night's War Horse premiere she steered clear of the horse on the red carpet - but only to protect her Alice Temperley gown. 'The horse was leaving piles of manure everywhere,' an onlooker said.
30 Kate's lookalike, 32-year-old Heidi Agan, charges up to £650 for a public appearance as our future Queen.
31 Kate and William announced on the 3rd December 2012 that they were to be parents. The news gathered 1,000 tribute tweets per second.
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