Charlotte, Louis & George pen first ever social media post to wish William happy Father’s Day with photo taken by Kate

A NEVER-before-seen picture of Prince William with his three children has been shared on Father's Day.

The heartwarming snap of Wills embracing Prince George, 10, Princess Charlotte, nine, and Prince Louis, six, was taken by Princess Kate in Norfolk last month while she bravely fights cancer.

The Waleses usually escape to Norfolk to unwind and have fun with their kids on the grounds of Amer Hall estate.

The gorgeous pic which shows the trio looking out onto the sunny beach setting, was uploaded to Kensington Palace's Instagram account.

Posted with an adorable caption by the three young Royals, it read: "We love you, Papa. Happy Father’s Day. G, C & L."

It is the first time a message from the children has been posted on the Palace's social media.

It comes a few hours after Wills posted a touching Father's Day tribute to his 'Pa' King Charles with a nostalgic photo taken 40 years ago.

The sweet snap shows a young William playing football with his dad on June 12, 1984.

"Happy Father's Day, Pa," the post, personally signed by William, said.

Earlier today, King Charles posted his own adorable Father's Day tribute to Prince Philip.

A video montage taken over 70 years ago filled with memories was posted on the Royal Family's official Twitter account.

The heartwarming post was titled: "Wishing all Dads, and those who may be missing their parents today, a relaxing Father’s Day."

Some of the nostalgic memories showed Prince Philip holding aloft Charles while he was a baby.

A young Charles enjoyed sailing with his father in the black and white footage, as well as playing outdoors.

Charles looked adorable as he laid on a blanket in the garden while clutching on to his stuffed rabbit toy.

Another sweet clip showed King Charles feeding horses with his father while Queen Elizabeth watched on.

The sweet post comes as Charles braved the pouring rain to salute troops at his first Trooping the Colour since his cancer diagnosis.

The monarch  to his official birthday ceremony on Saturday.

Charles, 75, and Kate, 42, were then reunited on the Buckingham Palace balcony for the first time since they both began cancer treatment.

It was a brave return to public life for Kate who has valiantly battled cancer for the last three months.

The Princess of Wales joined other members of the Royal Family to watch a spectacular flypast by the RAF as she made a triumphant return to public life at Trooping the Colour. 

She beamed on Saturday as she made her first public appearance in months with doting husband Prince William and their kids at her side.

Kate looked stunning dressed in white as she laughed and chatted away to her family.

Prince William, who looked dapper in his red Irish Guards uniform, proudly donning medals on his chest, beamed at crowds, too.

Well-wishers held Union Jacks high as they squished together along the Mall - donning crowns and fascinators atop their heads.

The streets were coloured red, white and blue, as fans waited patiently to see the Princess of Wales.

Crowds erupted in the afternoon as Princess Kate stepped onto the balcony with Wills and her kids at her side.

The day had been plagued by rain but downpours couldn't dampen Kate's shine as she beamed alongside her family.

Fans watched on in awe as the Princess joked and laughed with her children.

Princess Kate also shared sweet behind-the-scenes footage of her with George, Charlotte and Louis leaving for Trooping the Colour.

And while her appearance was highly anticipated by many, the Princess of Wales was eager to deflect attention away from her according to a body language expert.

She explained that Kate was keen to ensure that her father-in-law remained the focus during Trooping the Colour.