Prince Harry reportedly visited a hair loss clinic in London's Mayfair at the end of last year to combat his growing bald patch.

The Duke of Sussex, 35, apparently recently underwent hair thickening treatment at the prestigious Philip Kingsley Trichological Clinic, according to The Sun on Sunday.

Like both his brother, Prince William, and his father, Prince Charles, Harry has struggled with a thinning thatch in recent years.

Last year, one expert claimed the royal's bald patch had almost doubled since his wedding to Meghan Markle, 38, in May 2018.

The publication claims Harry visited the hair-loss clinic - which boasts an extremely rich clientele, including royalty, actors, models and athletes - towards the end of last year and has seen an improvement in his ginger locks since.

Prince Harry (pictured last month at the Rugby League World Cup 2021 draws in London) has reportedly visited a hair loss clinic in London's Mayfair to try to beat his growing bald patch

Last year, one expert claimed the royal's bald patch had almost doubled in size since his wedding to Meghan Markle, 38, in May 2018 (pictured)

Meghan is also thought to have visited the clinic before her wedding to Harry to ensure her locks were lustrous for the royal wedding.

A source said: 'Harry's visit caused a real stir. This company is so prestigious. It's one of the best places in the world. It's got a whole range of different treatment plans.'

'The richest, most famous and well-connected use it. The meeting with Harry went well.' It would be very expensive. It's the place to go in London and it's right in the heart of Mayfair.'

The Duke of Sussex (pictured in May 2019, with his thinning ginger locks on show) recently underwent thickening treatment at the prestigious Philip Kingsley Trichological Clinic, according to The Sun on Sunday

Harry's ginger locks were looking a little thinner during his visit to The Hague in May 2019, where he officially launched the Invictus Games

Transplant surgeon Dr Asim Shahmalak claimed in 2019 that the thinning hair on the royal's crown had dramatically increased as the Duke of Sussex juggled royal duties and fatherhood.

He also believes that Harry could have come under pressure from wife Meghan to treat his hair loss.

He said: 'She was a Hollywood actress in her former career so she knows very well the value of looking good.

'A lot of my clients come due to subtle pressure applied by their partners who would rather not be dating a bald man.'

Harry's bald patch is also visible in this photograph from the Duke and Duchess' wedding, which they shared as a Christmas card after their May nuptials

Harry, pictured here in 2005, previously had a full head of ginger hair. His baldness is said to have accelerated since becoming a father and husband

Is this what Prince Harry will look like at 50? Celebrity surgeon Dr Shahmalak produced this image of how the royal could look at 50 if his current rate of hair loss continues

Dr Shahmalak, whose clients include Calum Best and Dr Christian Jessen, produced an image of how Harry will look at 50 if his current rate of hair loss continues.

He said: 'Harry's baldness was slower to take off but now he is catching up his brother fast, particularly in the crown area. His bald patch has doubled in size in the last two years and sadly his baldness is accelerating fast.

'He is losing his hair at the same sort of rate that Prince William lost his in his 20s. The baldness gene in the Windsor family is extremely aggressive.

Prince William (pictured in January 2018) started balding in his twenties, and famously shaved his head in an effort to counteract his hair loss

Prince William and Harry both share the 'baldness gene' which could lead to the royals choosing certain hair styles

Baldness runs in the family: Prince Philip is also bald, while Prince Harry's uncle, Prince Andrew, has also struggled with hair loss

'It started with Prince Philip and has now been passed down to Prince Charles and on to his sons Prince William and Prince Harry. Let's hope baby Archie doesn't get it, too!

'Around 30 per cent of men have experienced some form of hair loss by Harry's age - so his case is not unusual, particularly when you have a baldness gene running in the family.'

Though Prince Charles is still hanging on to his hair, Harry's brother Prince William has long battled against baldness, and began losing his hair in his twenties.

The royal famously shaved his head in January last year in order to hide the worst impact of the hair loss.