Kate Middleton is renowned for her amazing physique and healthy lifestyle.
Many have wondered the secret behind the Duchess of Cambridges slim build, and it seems it's mostly down to a combination of sports and healthy eating.
Despite having three children the fit royal is known for her dedication to fitness.
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Carole White of Model Management told Mail Online that Kate is a dress size six, much smaller than the UK average, which is a size 16.
The Daily Star also revealed that exercise plays a large role in her routine.
They said: Kate is an exercise junkie. Pippa and Kate take their toned physiques extremely seriously. And mother Carole, in her 60s, is in extremely good shape.
Kate uses abs exercise the plank for a toned stomach.
The source added: It tightens her muscles. There are three elements, the basic plank, the side plank and the prone sky dive, all of which are positions Kate can hold for 45 seconds or longer and repeat at least ten times each.
As a busy mum-of-three the Duchess has claimed she is often on her feet, which could also explain her slim figure.
In terms of what she eats, it is saidKate follows the Dukan Diet, especially before her wedding to William.
According to ABC news the Duchess used the low-carb plan to prepare for her wedding to Prince William back in 2011.
The Dukan diet is a French plan, which focuses on eating high levels of protein in the first stage of the programme.
The diet claims to produce rapid, permanent weight loss without hunger. However, although it may have worked out well for Kate, this method might not work for everyone.
Later, followers of the plan add vegetables to their meals.
Dr. Dukan created the diet in the 1970s, inspired by an obese patient who said he could give up eating any food in order to lose weight, with the exception of meat.
After seeing many of his patients experience impressive weight loss results on his diet, Dr. Dukan published The Dukan Diet in 2000.
The book was eventually released in 32 countries and became a major bestseller.
Excerpt from:
What is the Dukan diet: the extreme diet Kate Middleton followed to lose weight before her wedding - RSVP Live
