AN ADORABLE baby photograph of Prince William has been shared by King Charles to mark his son's 42nd birthday.
The Monarch, 75, shared the heartwarming picture which shows Wills sitting on his lap as a tot.
In the touching black-and-white snap, Charles looks lovingly at his son, who is also brimming with joy.
The beautiful moment was captured at Kensington Palace in London, on February 1 1983.
It was uploaded to the The Royal Family x/formerly Twitter platform this morning.
The sweet message read: "Happy Birthday to The Prince of Wales!"
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The picture was credited to the Royal Collection Trust.
It comes after 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.
It shows the trio looking out onto the sunny beach setting, and was uploaded to Kensington Palace's Instagram account.
Posted with a touching caption by the three youngsters, it read: "We love you, Papa. Happy Father’s Day. G, C & L."
It marked the first time a message from the children had been posted on the Palace's social media.
Wills also posted an emotional Father's Day tribute to his 'Pa' King Charles with a nostalgic photo taken 40 years ago.
The sweet throwback showed Wills as a toddler playing football with his dad on June 12, 1984.
"Happy Father's Day, Pa," the post, personally signed by William, said.
King Charles shared his own adorable Father's Day tribute to Prince Philip.
A video montage taken over 70 years ago filled with memories was also posted on the Royal Family's official Twitter account.
It was titled: "Wishing all Dads, and those who may be missing their parents today, a relaxing Father’s Day."
Meanwhile Prince Harry failed to acknowledge the celebratory day - and seemingly ignored his father's official birthday Trooping the Colour.
SHOW OF SUPPORT
Prince William and King Charles' sweet posts and nostalgic throwbacks show a strong and united front amid current pressures.
The King has bravely been open about his cancer diagnosis and ongoing treatment.
Nevertheless, His Majesty looked in top form at both Trooping the Colour on June 15, and Royal Ascot this week.
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Charles proudly took to the stage to congratulate the winners after leading a carriage procession with Queen Camilla.
The Monarch chatted with jockeys as he presented a number of winners with awards during a glorious afternoon of racing.
