THE Princess of Wales' action-packed photo of Prince William and their children offers a "reassuring message" as far as her illness is concerned, a body language expert has claimed.
Kate Middleton, 42, shared a fun shot of Prince William during a beach outing to mark his 42nd birthday today.
In the photo, the royal can be seen holding hands with his three children, Princess Charlotte, Prince Louis and Prince George as they leap from a sand dune, while Kate is behind the camera.
And according to body language expert Judi James, the photo, which was uploaded on The Prince and Princess of Wales' official Instagram account, could hardly be a more "heart-warming message" given Kate’s cancer diagnosis.
Speaking to Fabulous about the snap, which appears to be taken from a beach in Norfolk, where the family have their country home, she says: "It would be near-impossible to create an image that sends out such emphatic signals of joy, exhilaration, unity and freedom."
Judi goes on to note how the photo also shows a body language signal known as 'pinged laughter.'
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It would be near-impossible to create an image that sends out such emphatic signals of joy, exhilaration, unity and freedom.
Judi James
"They're laughing at Kate and she's laughing at them - that's the image we have of of, even though we can't see her," she explains.
"It would be inconceivable that she would not also be sharing the fun and the laughter and that in turn sends out a reassuring message to all her many fans."
It comes just days after the mum-of-three posted a heart-warming photo of William with the kids at a similar setting on Father's Day.
Drawing a comparison between the two photos, Judi explains: "After the more pensive back-view pose for Father’s Day, Kate has turned the image around 180 degrees to show her husband and three children leaping in the air together in a choreographed explosion of energy and happiness."
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The body language expert goes on to say that all three children are happily throwing their total effort into the jumping pose.
However, she says it's their dad Prince William who appears to be the biggest ‘kid’ of all.
Noting that his body language signals suggest he is enjoying this leap the most, she continues: "We can see his leg muscles tensed to get the most height.
"And in a very telling and loving move, he's the one looking straight at the camera to look at his wife and to make her laugh, showing her his undivided attention.
"Both his and George's eye contact are directly for her."her."
As for the chosen pose, Judi says that jumping signifies a "burst of extreme pleasure that you just can't contain happiness."
She explains: "As a signal, jumping is quite rare.
"We do it very rarely in our lives spontaneously. But we do do it when something really brilliant happens."
It would be inconceivable that she would not also be sharing the fun and the laughter and that in turn sends out a reassuring message to all her many fans
Judi James
The body language expert continues: "That's why you see footballers leaping in the air when they score goals.
"It's like when we get good news, our muscles explode and it literally takes us upwards."
Judi also suggests the photo shows a "different dynamic" between the three children, which she says was also evident at Trooping the Colour.
"Prince George has very much taken over William's role with Louis," she says.
"Prince George and William were holding hands for quite a long time and they've only just uncoupled in public - and that's because William was very much training his son as a role model.
"But it's so interesting and touching to see that George is actually beginning to do the same protective gestures to Louis."
Timeline of Kate's health battle & recovery
JAN 16: Kate is admitted to the London Clinic for abdominal surgery
JAN 17: Kensington Palace announce the princess underwent surgery
JAN 18: William spends time at Kate's bedside
JAN 23: The princess' hospital stay passes one week
JAN 29: Kate leaves hospital
FEB 27: Prince William pulls out of service last-minute due to 'personal matter', sparking wave of unfounded conspiracy theories about Kate’s health
MAR 4: Princess pictured in the car with mum Carole on the Windsor estate
Mar 10: Royal posts a sweet snap of her and the kids for Mother's Day – then fans started spotting flaws, and massive agencies put out 'kill notice' on photo
Mar 11: Kate admits she edited photo, and is snapped in car with William
Mar 16: Royal fans spot the princess at farm shop near Windsor
Mar 17: Onlookers see Kate watching her youngsters playing sport
Mar 18: The Sun exclusively published video of Kate and Wills from two days prior
Mar 22: Kate bravely reveals in an emotional video that she was given a shock cancer diagnosis
April 29: Kate and William mark 13th anniversary releasing unseen wedding photos
June 8: Kate does not attend Colonel's Review but letter she penned to Irish Guards reveals she said: "I do hope that I am able to represent you all once again very soon"
June 14: Kensington Palace announces the princess will attend the King's Birthday Parade
The body language expert points out that we'll often see Prince George out in public, giving Louis little pats and nudges on the back, which is the kind of reassurance that William would've given to him.
"So it's almost a role delegation," she adds.
As for Princess Charlotte, Judi says: "What we're getting with Charlotte is almost like a mini me of the late Queen insofar as in public, she's keeping an eye on both of her brothers.
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"It doesn't matter that George is older, he'll get a sturdy nudge when he does something wrong."
Judi concludes: "But it's just so wonderful that despite those diverse roles when it comes to it, and when they're having fun, they just join in one line like those little paper dolls that used to cut out as children."