Royal fans were excited to see the family members out in full force on Christmas Day on their traditional walk through Sandringham for a church service.
The new monarch led his family on the walk to St Mary Magdalene for the first time since the Queen's death in September, reports the Mirror.
The group included some of the youngest royals, like Prince George, Princess Charlotte, and Prince Louis.
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During this walk, there were some touching moments between the kids, but one of the "sweetest and most poignant" moments took place when Prince George put a hand out on his brother Louis' back. This was one of the most important moments according to body language expert Judi James.
Judi claims that this signal between the two brothers was like a "mirror image" of the relationship that Prince William and Prince Harry shared as younger boys - before they grew up and seemingly apart.
Judi explained: "One of the sweetest and most poignant body language signals was the sight of George using touch, chat, and bending rituals to signal he is now in the role of protector and 'keeping-an-eye-on' monitor for his younger brother Louis.
"As the family reached the church William put a hand out to touch George's back and leaned towards his elder son but George was already using those same rituals towards his small and rather playful brother.
"The gesture looked spontaneous, as though this is a role he is taking on a lot and, after the footage of a young William and Harry growing up together that was shown in Harry’s Netflix show, it looked like a poignant mirror-image of how their sibling relationship shaped up before they grew up and fell apart.
"William was shown in caring mode for Harry back then, just as George is now with Louis. The links can't have been lost on William."
The expert went on to say that the Prince and Princess of Wales have shared several "intentional" gestures with their kids during the Christmas walk to show that they are becoming 'hands-off' parents.
She added: "William and Kate showed off their children with the usual signals of pride and it was clear they are now becoming 'hands-off' parents as their children grow in confidence.
"Charlotte was pulling ahead as they walked towards the church and George has gone from being the rather shy-looking boy holding his father's hand to the older brother keeping an eye on and showing nurturing and directional signals towards the four-year-old Louis."
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