She has her two adorable children with Prince William, also 35, second-in-line to the British throne.
The Duchess of Cambridge met her husband at St Andrews University, and the pair married in 2011. During her time at St Andrews Kate studied History of Art, and was also a keen sportswoman, playing hockey for the Scottish university.
The brunette also took part in a fashion show, modelling a risqué see-through design.
The dress was made by University of the West of England fashion graduate Charlotte Todd, who writes on her Twitter bio: “Fashion graduate & knitted textile designer. Designer of the see-through Kate Middleton dress worn in the 2002 St Andrews fashion show”.
The dress was created during a project called ‘The Art of Seduction’ and was never intended for Kate.
Charlotte Todd told People: “I didn’t know who Kate Middleton was and I didn’t put her in it. It was just pure chance!”
However, the designer made a huge sum from the dress when it was sold at auction in March 2011 for £78,000.
The auction took place in central London, and the designer appeared alongside her design to watch the event.
Like many of the designs Kate Middleton has worn, the see-through dress was a hit, and went for £65,000 plus a buyer’s premium of £13,000.
It was bought for a mystery bidder, so who knows where in the world the sexy garment is now.
The knitted slip has a blue band above the bust and at the bottom of the garment, where a turquoise ribbon is woven through the fabric.
When Prince William proposed to his now wife, the prince opted to use his late mother Princess Diana’s engagement ring – a stunning sapphire set in diamonds.
The move may have inadvertently boosted the value of the royal ring, which is now worth almost nine times its original value.
The ring was originally bought for Lady Diana Spencer in 1981, and cost an eye-watering £28,500.