Prince Harry has beaten his older brother William to be crowned Britain's most handsome young male royal.

Scientific research pioneered by the ancient Greeks found the face of the groom-to-be to be 81.4 per cent 'accurate.'

Harry's eyes, eyebrows, nose, lips, chin, jaw and facial shape came closest to the Greeks' idea of perfection under the Golden Ratio of Beauty Phi which measures physical perfection.

Prince Harry has been crowned Britain's most attractive male royal thanks to his
Prince Harry has been crowned Britain's most attractive male royal thanks to his "perfect facial symmetry". Photo / Getty Images

The Duke of Cambridge, 35, was narrowly beaten into second place by 33-year-old Harry with a rating of 80.9 per cent.

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Peter Phillips, 40, was third with 80.4 per cent and Zara Phillips' husband, ex-England rugby star Mike Tindall, 39, was fourth with 76.7 per cent.

READ MORE: • Meghan or Catherine: Who is more beautiful according to science?

All the younger generation of male royals were tested with the latest facial mapping techniques by Harley Street surgeon Dr Julian De Silva who uses the technology in his work.

The table was compiled ahead of two royal celebrations this year - Prince Harry and Meghan's wedding is on May 19 and the Duchess of Cambridge's third baby is due in the next few weeks.

Dr De Silva, who runs the Centre For Advanced Facial Cosmetic & Plastic Surgery in London, said: "Which of Princess Diana's sons is the most handsome has been a subject of debate for a number of years.

"Now science has provided the answer - Prince Harry is a very narrow winner in a close contest which reveals that both men are incredibly handsome.

"Prince Harry has striking facial symmetry and gets closer than all the other royal men to having what the ancient Greeks considered the perfect face.

"Harry scored particularly highly for the shape of his chin, the near-perfect length of his face, the gap between his nose and lips and his eye spacing.

"Prince William gets a very high rating, too, and stands out for having easily the highest score for his nose and for his eye position.

"Princess Anne's son Peter Phillips also scores very highly and was only just behind in third. He got very high marks for perfectly equal gaps between his mouth, eyes and forehead.

"Mike Tindall was obviously marked down for his nose which has clearly been permanently misshaped by an old rugby injury. He scored 66.7 per cent for his nose width, compared to Prince William's top mark of 89 per cent."

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

'The Phi ratio of 1.618 has long been thought to hold the secret of beauty, and now with the computer mapping we can calculate exactly how it applies to all the royal princes.'

READ MORE: • Spot the major difference in Meghan and Catherine's photos

Prince Harry's 81.4 per cent score was a few points behind his fiancée Meghan Markle, 36, who had a rating of 87.4 per cent, narrowly ahead of the Duchess of Cambridge, 36, who scored 86.8 per cent.

That makes Harry and Meghan the best looking royal couple.

Meghan's face was deemed more beautiful that Catherine's. Photo / Getty Images
Meghan's face was deemed more beautiful that Catherine's. Photo / Getty Images