He told OK! magazine: “When she first became a Duchess, she and William were thought by some to be too formal, as though they were trying too hard but I would say we’re now seeing a complete transformation.

“It’s been very gradual but Kate’s developed a unique style of her own.”

However, over the years, not all of their royal engagements have gone smoothly.

According to several unearthed reports, during their visit to Canada in 2011, Prince Charles was furious with them.

A 2011 Daily Mirror report claims that Charles was worried the couple’s glamorous image would have overshadowed the worthy work of other senior royals.

The Prince of Wales reportedly told Palace aides that the Duke and Duchess of Cambridge’s trip focused too much on media coverage and not on the serious reasons behind the tour.

The 11-day visit nine years ago, when ­hundreds of thousands turned out to greet the royals in Canada, became known as the William and Kate Show.

The report reads: “Sources close to Charles claim that on the one hand he is ­delighted the couple received the same welcome he and Princess Diana got on their 1983 Canada tour.

“But he also drew a comparison with his gruelling 11-day visit to Canada with Camilla two years ago which attracted small crowds and modest coverage.

“A royal insider says Charles – who prides himself on being a campaigner on the environment and architecture – is now seeking a makeover to attract more fans.”

“From that moment people would be less interested in what he has to say on issues such as the environment and architecture if, on the same day, Kate is wearing a new dress.”

Mr Dampier added: “When Charles and Camilla visited ­Canada two years ago, they were greeted by relatively small crowds. They are in their 60s and are not what you would call glamorous.

“Charles is well respected in Canada but he does not have the X factor.

“With the Queen’s headline-grabbing Irish tour too, Charles feels his work could get overlooked.”