Back in 2014, when the Duchess was still pregnant with hers and Prince William’s second child, the couple embarked on a visit to New York.
They landed in the city in December and given the season, stopped by a charity to lend a hand wrapping presents.
The Duchess settled down at a table alongside staff at the Northside Centre for Child Development.
But as she helped, someone took the opportunity to engage in a cheeky exchange with the royal.
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Why Kate Middleton once got ‘telling off’ during royal visit to US
Kate Middleton: The Duchess briefly rolled her eyes during the wrapping exchange
A video of the event showed someone stepping behind her and quickly prodding her on the shoulder.
As she turned around to greet them, they told her to “keep wrapping”, earning a swift rebuke.
When Kate turned back to focus on her job, the camera caught her rolling her eyes.
The candid moment came as she sat alongside local grandmothers and helped prepare gifts for some of Harlem’s most deprived children.
Kate Middleton: The Duchess visited Harlem with Prince William in 2014
And it was a rare one, as the royal is famous for keeping her composure.
She also appeared in a candid moment during the Earthshot Prize Awards.
The awards, set up by Prince William to recognise people who have made notable contributions to environmentalism, saw the two mingle with high-profile guests at Alexandra Palace in London.
While there, a photographer caught a rare moment of intimacy between the couple.
Kate Middleton: The couple had more than one candid moment at the event
Chris Jackson snapped a picture of the two as they walked through the palace halls greeting guests.
The Duchess placed her hand on her husband’s lower back while she stared intensely into his eyes.
The intimate black and white photo was reminiscent of others issued by the Duke and Duchess of Sussex, who now reside in the US.
But, unlike their family across the Atlantic, the Duke and Duchess of Cambridge generally abide by the Queen’s rules on public affection.
During formal occasions, most royals will refrain from making personal contact.
Contact could include holding hands, cuddling or the odd kiss.
Informal events would likely see wedded royals act more like a couple.
Source: EXPRESS CO UK