Behind the Royal Veil: Princess Diana's 'Shy' Balcony Appearance and Revealing Post-Wedding Kiss With Prince Charles Decoded by Lip Reader

Lady Diana Spencer's lavish, "one-of-a-kind" royal wedding to the heir to the British throne, Prince Charles, on July 29, 1981, is a day that still resonates with many royal fans despite its unhappy ending.

For a couple that hardly knew one another and had next to nothing in common, the new Prince and Princess of Wales charmed the masses despite the aristocrat's daughter's "shy" body language, which has now been decoded.

"This 'fairytale' event was later described by Diana as 'the worst day of my life' and there are clues to her powerful but conflicting emotions during these six key moments," lip reader Judi James told an outlet. "Even if we take away the royal theme, Diana’s wedding day had red flags flapping about like bunting in the breeze."

The analyst then describes six "telling" moments of the one-time future queen's reactions that are worth examining.

Lady Diana exhibited "anxious behavior" upon her arrival at St Paul's Cathedral in the storybook Glass Coach next to her father, Earl Spencer, who was still recovering from a "catastrophic" stroke three years earlier. "One minute she is coy and smiling shyly but the next a look of utter sadness replaces the eye-smiles as her mouth seems to droop slightly, suggesting feelings of fear as well as excitement," James observed.

The duo's "pensive carriage ride" through the streets of London after the conclusion of the nuptials was also analyzed. "Her eye-engage and her smile look natural and relatable," the analyst shared. "It was an expression of personal friendship rather than a royal rictus. She may have been feeling that any love she might miss from Charles would be there for her from the public."

Diana would go on to be known as "the People's Princess" following her tragic death at the age of 36 in 1997.

When observing the future king and his first wife's post-wedding Buckingham Palace balcony apperance, James shared: "The pecking order was made clear here, the Queen is to the front with her son just behind her. Diana’s dipped head and shy smile suggest she understood her place in the line-up and was happier standing back in a warmer and less formal role."

James had nothing but positive assessments to reveal about Charles and Diana's balcony kiss in front of hundreds of millions around the world.

"Leaning towards him, she turns and throws back her head and stretches and bares her neck in a gesture that signals high levels of trust in him now he is her husband," she said of the kiss. "Her belief in fairytale romance is obvious here, despite all the glaring red flags to suggest the opposite."

The Prince and Princess of Wales separated in 1992 and divorced in August 1996.

The Sun reported on James' analysis.