Prince William has wished his father a happy birthday with a heartfelt throwback snap from 2004, when the pair enjoyed some skiing on the Madrisa ski slope above the Swiss village of Klosters.
The royal, 42, celebrated King Charles' 75 with a sweet photo of the pair from 19 years ago.
In the picture, both share a side-hug as they smile for the camera in their winter gear.
Sharing a carousel of images, the monarch's eldest son also included a solo snap of the King at The Arc De Triomphe in Paris this September and a balcony photo of the family from the Trooping the Colour ceremony in June.
Posting the selection to the @princeandprincessofwales account, the couple said: 'Wishing His Majesty The King a very happy 75th birthday!'
It is perhaps no surprise that William chose a photo from Klosters for his father's bid day, as Charles is known to have a deep fondness for the Swiss village, where he has been skiing for more than 40 years.
In 2018, he held a private party there, to mark his extraordinary attachment to the exclusive resort.