Megxit has seen Kate Middleton's 'coming of age,' a royal expert believes.

Duncan Larcombe says the Duchess of Cambridge, 39, has shown unwavering commitment to the Queen after Prince Harry and Meghan Markle announced their bombshell decision to step down as senior members of the royal family.

The announcement sent ripples through The Firm and made people question what exactly was going on behind Palace walls.

But despite the drama and headlines surrounding Harry and Meghan's exit, Duncan believes it's made Kate shine.

He told OK! Magazine: “The royal family has had a very turbulent three years. So now more than ever, they are looking for stability.

“The royal tectonic plates have shifted and, whether we like to admit it or not, Queen Elizabeth’s reign is drawing to a close, so the focus must be on the future.

Kate Middleton has carried out numerous royal duties during the coronavirus pandemic. Here the Duchess of Cambridge is pictured visiting a vaccination centre at Westminster Abbey
Kate has carried out numerous royal duties during the coronavirus pandemic. Here the duchess is pictured visiting a vaccination centre at Westminster Abbey

“Charles will still succeed his mother, but everyone knows that King William and Queen Catherine are the future.

“Her Majesty must give thanks every day that William picked such a dutiful, reliable wife.”

He continued: “William and Kate have got through 10 years of marriage and royal duties without so much as a moan.

“Like any couple, they’ve had their ups and downs, their rows and tensions. But their commitment to the Queen and to this country has been unwavering... and the controversy over Meghan and Harry’s departure from the UK has made that even clearer."

Kate Middleton is starting to look like 'queen-in-waiting', a royal expert believes
Kate is starting to look like 'queen-in-waiting', a royal expert believes

Just last month Meghan and Harry laid bare their mental health struggles while working as a royal and told Oprah Winfrey how they felt there was a lack of support.

Harry also said his brother, Prince William, and father, Prince Charles, are "trapped".

He said: "My father and my brother are trapped. They don't get to leave, and I have huge compassion for that."

Afterwards, a source close to William, 38, claimed the Duke of Cambridge was "reeling" following the interview.

Prince William speaks as wife Kate Middleton looks on, both wearing face masks, during their December Royal Tour in Scotland
The royals were rocked by Megxit

"His head is all over the place on it," they said.

But expert Duncan believes with Megxit we have seen the "coming of age of Kate".

She has carried out numerous royal duties during the coronavirus pandemic.

He said: "It seems crazy now, but before the wedding, some people thought Kate was a little dull. There was a bit of ‘she’s no Diana’ and ‘she’s never going to be a style icon’ – but look how she’s proved them wrong.

Prince Harry and Meghan gave a deeply personal interview to Oprah Winfrey about royal life
Prince Harry and Meghan gave a deeply personal interview to Oprah Winfrey about royal life

“She was never going to be a rock-star, red-carpet royal, but in the last 12 months post-Megxit, we have really seen the coming of age of Kate.

“She is really starting to look like a queen-in-waiting.”

Kate and William will celebrate their 10th wedding anniversary on April 29.

The pair are said to be planning a low-key celebration with their three children, George, seven, Charlotte, five, and Louis – who turns three just six days before their anniversary – at Anmer Hall in Norfolk, where the family have spent lockdown.