Charles was crowned in Westminster Abbey, when the Archbishop of Canterbury, Justin Welby, placed St Edward’s crown on his head.
With 2,300 guests in the abbey and the world looking, the body language of the senior members of the royal family was under scrutiny.
“Charles interlocks his fingers as he relaxes his hands, showing a slight gesture of self-soothing and relaxation,” communications coach and media coach Sonia Beldom told the PA. news agency.
He said the king showed dignity from the moment he entered the abbey.
“Charles’s face displays immense poise and his slightly open mouth displays a genuine smile for everyone he greets as he enters,” she said.
The newly crowned queen’s body language was more relaxed than her husband’s.
Camilla “looks relaxed and very happy, with her chin tilted slightly down to convey respect and humility,” Beldom added.
The couple’s bond was evident in their body language, the expert also said.
“His deep connection to Camilla is clear when he looks up at her at key moments – this is a sign of togetherness even though they are feet apart,” she continued, while the “chin level, gentle smile and alert eyes ” of Camilla are a sign of “balance and confidence”.
When Charles delivered a King’s Prayer, the first time a monarch has spoken words to God aloud during a coronation, Ms Beldom said: “His tone of voice is clear, resonant and dignified in its rhythm, conveying a great authority and gives us a sense of having a strong and dignified man as our King.
“Her voice is comforting in its tone and presence. Her voice commands respect and is a voice you want to hear.”
However, some aspects of the King’s body language could have betrayed his inner thoughts, Beldom noted.
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During the service, he said that the King’s blink rate occasionally increased: “This can often be a sign of heightened emotion.”
Furthermore, when the Prince of Wales kissed his father’s cheek, Mrs Beldom suggested that the King was “visibly moved”.
When you “look down, this indicates that you are accessing a deep internal dialogue,” he suggested. “She’s literally ‘feeling’ what’s going on around her in her thoughts.”
Much can also be gleaned from the body language of other family members.
The Duke of Sussex “seemed a bit nervous,” Beldom said. “His nods to him are a bit abrupt.
“He’s more relaxed when he’s inside the abbey,” he added, noting that his body language became “more fluid” after this point.
Ms Beldom continued: “The Prince and Princess of Wales are characterized as very professional, as they move together and are perfectly in sync, displaying like-minded and kindred spirits.”