Most dramatic royal style transformations: From Princess Kate's clubbing outfits to Princess Charlene's beach babe days

The moment a young Kate Middleton started dating Prince William, the nation was transfixed. At university, the History of Art student was the It-girl of St Andrews, rocking low-slung jeans, spaghetti strap tops and glitzy clubbing outfits. 

In a major departure from her 2000s wardrobe, the Princess of Wales is now an emblem of royal style perfection. With her unrivalled elegance and polished power dressing, the Princess rarely steps a foot out of line when it comes to fashion, sticking to the same silhouettes and fail-proof outfits. 

SEE: Princess Kate's cool-girl university outfits that turned Prince William's head

She often favours designs that ooze femininity and quiet luxury, continually reigning supreme as one of the best-dressed royal ladies.

Before she became the Duchess of Edinburgh, Sophie Rhys-Jones was a PR executive who had landed a job at Capital Radio, going on to set up her own successful PR business by 31. 

Duchess Sophie's timeless fashion from the nineties proves she was an unmistakably elegant style figure of her time. From tailored mini skirts to head-turning trouser suits, the bright-blonde PR girl donned the boldest business-babe fashion looks. 

Since becoming a loyal member of the Royal Family, Duchess Sophie's sartorial elegance is unmatched. With a penchant for pastels, feminine silhouettes and marvellous millinery, the mother-of-two has never lost her eye for a polished look.

Before the days of her bespoke Dior dresses and long-lasting relationship with British designer Bruce Oldfield, Camilla, née Shand, was just like any Londoner in her twenties - experimenting with bold colours and flirting with fit-and-flare silhouettes.

Now, as matriarch of the royal family, the wife of King Charles' style is as superior as her royal title. The Queen tends to favour muted colours, often opting for rich velvet fabrics and navy hues for official engagements, though in her jewels and millinery, Her Majesty isn't afraid to go bold.

During her teens and early twenties, Princess Beatrice very much tapped into the Y2K zeitgeist, producing a string of avant-garde looks. She relied upon A-line frocks, twee prints, colourful hues and noughties-inspired outfits - as many of us did during the divisive 2000s.

Thanks to her stylist, Olivia Buckingham, Princess Beatrice has blossomed in the clothing department across the years, increasingly experimenting with different styles, silhouettes and brands.

Meghan Markle's style has done a full 180º in the years she has been in the spotlight, proving the versatility of her sartorial prowess. 

In her Suits days, the former actress experimented with corporate looks (inspired by her character, Rachel Zane) and casual Cali-girl outfits. Her style weapon was a red lip, and she was rarely seen without a pair of killer heels as she graced the fashion circuit and flitted between red carpets.  

When she married Prince Harry, the Duchess was a vision of royal style perfection, donning tailored coat dresses and sophisticated, modest silhouettes. 

Since stepping away from royal duties, Meghan's former, refined style has since relaxed. The mother-of-two can often be seen wearing trouser suits and chic button-downs, experimenting with neutral tones and daring necklines. 

Princess Charlene of Monaco, née Charlene Wittstock, has had one of the most dramatic style transformations of all the royals. Before she met Prince Albert, the Bulawayo-born Olympic swimmer was a fresh-faced cover girl who graced the front page of Sports Illustrated in a series of baywatch-inspired looks. 

THROWBACK: 18 times Princess Charlene was an Olympic goddess in poolside photos

From her immaculate tailoring to her bold power suits and penchant for high-end brands, Princess Charlene has since become somewhat of a sartorial maven in the years she has been married to Prince Albert. 

"Finding my fashion feet has certainly been the biggest challenge," she said in an interview with Vogue prior to her royal wedding in 2011. "I realise that my debut into Monaco society should have been better executed!"

Born Sofia Hellqvist in 1984, Prince Carl Philip of Sweden's wife Princess Sofia first emerged into the public eye, as a model and reality TV star - and her cool-girl outfits were worlds away from her royal wardrobe. 

In the documentary The Year with the Royal Family, Sofia didn't shy away from addressing her past. "For me, it’s pretty boring. It happened 10 years ago, and I moved on with my life."

Now, Princess Sofia has mastered the art of modest, royal dressing, while still staying true to her bright personality and penchant for on-trend designs. 

Queen Mary, née Mary Donaldson, has come a long way from the moment she wore baggy jeans and a pullover to cheer on then-boyfriend Crown Prince Frederik of Denmark – whom she had met at a pub during the 2000 Olympics in Sydney – at the Hobart Yacht Club in 2003. 

Nowadays, the royal is known for her impeccable and conscientious style, often rewearing pieces that date back to more than a decade ago from her wardrobe. The royal's sleek sartorial elegance is often linked to the Princess of Wales; Chanel designer Karl Lagerfeld even said that Princess Kate could be her "little sister".

As former TV news anchor Letizia Ortiz, Queen Letizia of Spain always had a polished, sophisticated image ready for the spotlight. 

The Spanish royal has undoubtedly stepped up her fashion A-game game since marrying King Felipe VI and is consistently considered one of the best-dressed royal ladies. From her vibrant outfits to her head-turning hats, waist-cinching silhouettes and ultra-glamorous aesthetic, Queen Letizia rarely puts a foot out of line when it comes to royal dressing.