King Charles has developed a "greater sense of confidence" since the late Queen's death, a body language expert has claimed.
Darren Stanton lifted the lid on the royal's "'period of transition" in recent months, as he prepares to be crowned alongside the Queen Consort, Camilla, on Saturday.
He believes that Charles has become "more statesmanlike" since taking on the role of monarch, and is no longer having to reassure himself through the use of "pacifying gestures".
The expert also noticed that his confidence "flows from Camilla", who is "effectively his rock or backbone in regards to giving him advice".
Speaking on behalf of Betfair Bingo, Mr Stanton said: "Charles was never a man who came over as entirely confident, which was evident in his engagement interview with Princess Diana.
"However, certainly since the passing of the Queen, we have seen a number of developments in his overall self assurance and confidence levels.
"There has generally been a decrease in the level of pacifying gestures, which are often used in moments of self reassurance, for example biting our lip or touching our face.
"The classic ones I’ve previously observed with Charles is that he used to place his hand inside his jacket. Also, King Charles used to play with his cufflinks quite a lot, which is a pacifying gesture.
"The fact that he does not show these gestures anymore tells me that he has become more confident - not only in his role, but also within himself."
Studying the body language of 20-year-old Charles, Mr Stanton noted a "real lack of confidence, uneasiness and vulnerability".
He continued: "In terms of his posture and demeanor now, Charles is a lot more statesmanlike. He seems a lot more confident in the way he stands. Nowadays, he tends to stand upright, with his shoulders back and his posture straight.
"Again, he comes over with a lot more confidence and self reassurance. He tends to be a lot more sporadic and moves more quickly.
"We don’t see that many pacifying gestures now as we once did back in 1969."
Mr Stanton also picked up on signs pointing towards Charles and Camilla being a "very strong couple".
He said: "As Charles is quite an introverted person, I don’t believe he is the biggest fan of public speaking, whereas Camilla does love talking and interacting with members of the public. I feel that this is a quality Charles admires and respects in his wife.
"I feel that now more than ever Charles feels confident and reliant on Camilla, as the two can be totally honest and authentic in the way they care for each other.
"It’s clear from the glances that they give each other while out in public that they are very much in love, and enjoy a great sense of humour together."
The expert's comments come after Sir Lindsay Hoyle praised the King as a "force for good" who will "bring the Commonwealth together".
The Commons Speaker said Charles's reign will bring a "new relationship" between Parliament and the monarchy as he approaches the role with his own distinct style.
"I've got to say what a privilege that we've got the sadness of Her Majesty, but we've now got the sunrise of a new King coming," he said.
"We have a new monarch and I think that will be a new relationship and a new development between the elected house and the monarch himself."
The Speaker, who has met Charles on a number of occasions, described him as "witty" and "charming" in their interactions, one of which involved meeting his counterparts from British Overseas Territories for a special lunch.
"I genuinely believe that he is a force for good, but not only that - he will bring the Commonwealth together," Sir Lindsay said.
