The Princess of Wales is not only known to share a very close bond with King Charles but, according to experts, has helped her father-in-law in many ways too.

Prince Louis and the King during the late Queen’s Platinum Jubilee

The Princess of Wales has helped King Charles become more relatable in major shift, according to many royal experts.

Speaking in a brand-new documentary ‘Kate and The King: A Special Relationship’, the royal has helped her father-in-law in many ways since officially joining the Royal Family in 2011.

The pair are said to have become even closer since their cancer diagnoses earlier this year, but the 42-year-old is known to have helped the King become more relatable – especially when it comes to his relationship with his grandchildren.

Princess Kate’s cancer diagnosis was revealed less than two months after the monarch shared his own at the start of February.

Here Express.co.uk looks at four ways Kate has helped the monarch – all explored in the new Channel 5 documentary.

Speaking on the documentary, the Sun’s Matt Wilkinson discussed how the King helped calm his grandson, a “very lively” Prince Louis

The expert said: “That moment at the Jubilee where I think Kate was having problems with Louis, who is a bit of a handful, and she turned to Charles and he was a calming influence on a very lively young boy.”

In the clip, which was aired on television in June 2022, Louis appeared delighted to sit on his doting grandfather’s lap.

Louis, who is set to celebrate his sixth birthday later this month, was earlier seen making cheeky gestures at his doting mum.

Prince Louis reaches to ‘Grandpa Wales’ in sweet family picture

In another sweet grandfather moment, body language expert Judi James pointed out that Louis and the King’s bond could be spotted in the picture released ahead of the monarch’s 70th birthday in 2018. Holding onto her youngest son, Princess Kate could be seen allowing Louis to lean forward and cheekily grab onto his grandfather’s face – much to his amusement.

Speaking in the documentary, Ms James said that the moment shows that Kate knows Charles “would approve of this” – even in a formal picture.

She said: “You can see from Charles’s body language that, he’s got George on his knee, looking a little bit awkward [and] looking rather formal, but Kate is allowing Louis to lean forward and rub his fingers on Charles’s face and make Charles look like a normal granddad.

“That is absolutely phenomenal because for a formal picture, how did Kate know that Charles would be happy with that. She clearly did because she’s smiling, but she’s not doing what most of us would be doing [holding the child back]… she knows that Charles would approve of this.”

The King pictured with his eldest son, Prince William

A third moment pointed out in the documentary is how Princess Kate “comforted” her father-in-law at Prince Philip’s funeral in 2021.

Speaking about the moment, The Telegraph’s royal correspondent India McTaggart said: “At Prince Philip’s funeral, we saw her comfort him when he was clearly grieving. She’s more and more tactile with him, I think, which is also lovely to see.”

A fourth picture is evident in a photo taken by Kate which shows the King resting his head of William’s shoulder.

In the documentary, The Daily Mail’s Richard Kay said: “If anything summed up the relationship with Kate has with Charles, it is the photograph that she tried to get, and issued to the public, of the King with William. In the picture, William towering over his father and Charles is playing up the image because he rests his head affectionately on his son’s shoulder.”