Reasons why the royal family is laughing in Prince Charles' birthday portrait finally revealed

The royal family charmed the public with their happy faces in the family portraits that surfaced on social media to mark the 70th birthday of Prince Charles. Supposedly, there are reasons why they were laughing in one of the candid shots.

An unknown source exclusively told Us Weekly that it was because of the children’s nanny that all the royals were looking jolly in the behind-the-scenes shots taken by photographer Chris Jackson.

Prince William and Kate Middleton’s three children, Prince George, five, Princess Charlotte, three, and six-month-old Prince Louis, all looked adorable as ever as they were being entertained by their Nanny Maria Borrallo.

Supposedly, the nanny was standing beside the photographer making silly faces and waving to get the children’s attention.

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At one point, as Borrallo was focused on making the children smile, everyone suddenly burst into laughter. Jackson was quick to take the snapshot, which was probably the reason why he is trusted by the royals.

“He has an eye for those wonderful candid moments that make pictures like this so special,” said the royal source.

The photo shoot only lasted for 15 minutes since “everyone had to work fast” because of the young royals.

In addition, there might have been another reason why Prince Harry and Meghan Markle’s smiles were extra special at the time.

The source revealed that when the shots were taken in mid-September in the gardens of Clarence House, the royal couple has not told anybody yet that they were expecting their first child.

In the photos, Markle, who wore a fitting dress, did not have any visible baby bump then. It wasn’t until October 15 when they officially announced the pregnancy.

Even though the photo shoot was short, the royal family was reported to have spent the afternoon together at Clarence House for a special bonding moment.

Despite how the public gushed over the sweet family portraits, many noticed the missing senior royals, Queen Elizabeth II and Prince Philip.

A former royal correspondent suggested that the Queen may have chosen to not include herself out of respect for her son.

"The main reason is that it's Prince Charles' birthday portrait, so he should be the most senior member of the royal family to appear in it," Duncan Larcombe said to Harper's Bazaar.

Meanwhile, a body language expert examined the family portraits and explained Prince Charles’ personality with the way he posed in front of the camera.