King Charles extended a warm birthday wish to Prince William by sharing his adorable childhood photo.

On June 21, the official page of the royal family shared a black-and-white photo of the father-son duo.

In the shared photo, the then Prince Charles was seen affectionately holding his little William. 

The Monarch wrote, "Wishing the Prince of Wales a very happy birthday." 

Notably, on Sunday, the Prince of Wales paid a heartfelt tribute to his father on the auspicious occasion of Father's Day.

He shared a sweet throwback picture featuring a young him playing football with his dad. 

The future King of England wrote on his and Princess Kate's official Instagram account, "Happy Father’s Day, Pa. W."