Supermodel Bella Hadid has been declared the most beautiful woman in the world following science research into what constitutes the 'perfect face'.

The 23-year-old was found to be 94.35% 'accurate' to the Golden Ratio of Beauty Phi - which measure physical perfection.

Her eyes, eyebrows, nose, lips, chin, jaw and facial shape were measured and came closest to the ancient Greeks' idea of perfection.

According to science, supermodel Bella Hadid is the most beautiful woman in the world

The 23 year old topped the list compiled by Harley Street facial cosmetic surgeon Dr Julian De Silva

Singer Beyoncé, 38, was second with 92.44%, actress Amber Heard, 33, was third with 91.85% and pop star Ariana Grande, 26, was fourth with 91.81%.

Kate Moss, 45, the highest rated Briton and in sixth place overall, had a reading of 91.05% - well ahead of her rival and the UK's other most successful supermodel, Cara Delevingne, 27, who was in tenth place with 89.99%.

How is the Golden Ratio of Beauty Phi measured? The Golden Ratio of Beauty Phi originates from the European Renaissance. Artists and Architects used an equation - known as the Golden Ratio - as an aid during the creation of their masterpieces. Scientists have since adapted the mathematical formula to explain what makes a person beautiful. The length and the width of someone's face is measured and then the results are divided. According to the Golden Ratio, the ideal result is roughly 1.6. Measurements are then taken from the forehead hairline to the spot between the eyes, from the spot between the eyes and the bottom of the nose and from the bottom of the nose to the bottom of the chin. A person is considered to be more beautiful if the numbers are equal. Attention is then given to the symmetry and proportion of the face. To be deemed 'beautiful' according to the Golden Ratio, the length of the ear must be equal to the length of the nose and the width of an eye should be equal to the distance between the eyes. Advertisement

The list was compiled using the latest computerised mapping techniques by Harley Street facial cosmetic surgeon Dr Julian De Silva, who utilises the technology in his work.

The ten most beautiful women in the world - and their Golden Ratio scores 1: Bella Hadid - 94.35 per cent 2: Beyoncé - 92.44 per cent 3: Amber Heard - 91.85 per cent 4: Ariana Grande - 91.81 per cent 5: Taylor Swift - 91.64 per cent 6: Kate Moss - 91.05 per cent 7: Scarlett Johansson - 90.91 per cent 8: Natalie Portman - 90.51 per cent 9: Katy Perry - 90.08 per cent 10: Cara Delevingne - 89.99 per cent Advertisement

Dr De Silva, who runs the Centre For Advanced Facial Cosmetic And Plastic Surgery, in London, said: 'Bella Hadid was the clear winner when all elements of the face were measured for physical perfection.

'She had the highest overall reading for her chin which, with a score of 99.7%, is only 0.3% away from being the perfect shape. Bella also came second behind Scarlett Johansson for the positioning of her eyes.

'Beyoncé ran her a close second, scoring the highest marks for the shape of her face (99.6%) and getting very high scores for her eyes, brow area and lips.

'These brand new computer mapping techniques allow us to solve some of the mysteries of what it is that makes someone physically beautiful and the technology is useful when planning patients' surgery.'

The Golden Ratio was a mathematical equation devised by the Greeks in an attempt to measure beauty.

Women with the most beautiful features Dr Julian De Silva pinpointed which stars had the most beautiful nose, eyes, eyebrows, chin, lips, forehead and face shape Nose - Amber Heard 99.7 per cent Eyes - Scarlett Johansson 99.9 per cent Lips - Cara Delevingne 98.5 per cent Eyebrows - Cara Delevingne 94 per cent Chin - Bella Hadid 99.7 per cent Forehead - Kate Moss 98.8 per cent Face shape - Beyoncé 99.6 per cent Advertisement

The ratio can be applied to anything and was used by Leonardo Da Vinci for the perfect human male body in his famous work, the Vitruvian Man. The premise behind this is that the closer the ratios of a face or body are to the number 1.618 (Phi), the more beautiful they become.

Bella Hadid, who began modelling when she was 16, has twice been voted Model of the Year.

Research by Dr Julian De Silva from The Centre For Advanced Facial Cosmetic & Plastic Surgery at 23 Harley Street.

Top ten and Dr Julian De Silva explaining why stars are so beautiful and where they were marked down

1. Bella Hadid - 94.35%

Dr De Silva said: 'Bella Hadid is a worthy winner with stunning facial symmetry and a chin only 0.3% away from perfection.

'She also came second for her eye positioning. She is one of the new generation of supermodels and could dominate the profession for the next decade with her stunning looks. Her biggest weakness is in the brow area.'

2. Beyoncé - 92.44%

Beyonce came in second place as she scored highly on her forehead and brow area

'Beyoncé looks incredible as she approaches her 40s. She had a new perfect score for her face shape, but was marked down for her eyebrows and chin,' the surgeon commented.

3. Amber Heard - 91.85%

The shape of Amber's nose and chin secured her third place position in the list

'Amber ranks so highly because of the wonderful shape of her nose and chin. She has an ageless beauty.

'She would have been higher with a stronger face shape,' Dr De Silva shared.

4. Ariana Grande - 91.81%

Pop star Ariana Grande has also been added in the list that was compiled by using the latest computerised mapping techniques

Dr De Silva said: 'It is great to see one of the new generation of pop stars make the list. Ariana scored highly for her forehead and chin. Marked down for her eyebrows and the larger than average gap between the top of her lips and her nose.'

5. Taylor Swift - 91.64%

Taylor's chin and lips scored highly. However, her eyebrows did not

'Another star who has emerged in the last five years. She rates very highly for her chin and lips but was kept back by a low score for her eyebrows,' The Harley Street specialist said.

6. Kate Moss - 91.05%

At number six is 45 year old British model Kate Moss who scored highly on her forehead and eyebrows

On the subject of Kate Moss, he commented: 'Kate is the highest rated Briton on the list and will be delighted that she is four places higher than our other supermodel, Cara Delevingne. Second highest marks for her eyebrows and one of the highest scores for her eye spacing, but let down by her chin.'

7. Scarlett Johansson - 90.91%

The American actress scored a Golden Ratio rating of 90.91%

Dr De Silva said: 'She had the highest marks of all for the position of her eyes but was let down by her face shape and thin lips.'

8. Natalie Portman - 90.51%

According to Dr Julian De Silva, Natalie's brow area let her down and left her in eighth place as a result

'Natalie has perfectly positioned eyes but was let down by a low score for her brow area,' the surgeon stated.

9. Katy Perry - 90.08%

Teenage Dream singer Katy Perry scored highly for the position of her nose

'Katy scored very highly for nose but was let down by her chin,' Dr De Silva added of Perry.

10. Cara Delevingne - 89.99%

Cara ended the top ten with a high rating for her lips and eyebrows

Dr De Silva said: 'Cara's unusually large forehead scored against her. She is famous for her very full eyebrows which are stunning and achieved top marks. Her lips are beautifully shaped and also came top.'