The picture of the two future kings was taken in June 1984 in the gardens of Kensington Palace.
Prince William has posted a picture of him and his father, King Charles, playing football to mark Father’s Day.
In the photograph, the young prince smiles as he and the future monarch stand in a garden.
The royal youngster is pictured wearing dungarees and a striped shirt, while Charles looks relaxed in a double-breasted suit jacket.
The picture of the two future kings was taken on 12 June, 1984 in the gardens of Kensington Palace.
Later that same year William would gain a younger brother, with the Duke of Sussex born in September.
As well as marking Father’s Day, the football-themed image is perhaps a nod to England’s opening match in the Euros, which takes place on Sunday night.
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It comes a day after the pair were involved in the Trooping of the Colour festivities at Buckingham Palace on Saturday.
The Prince of Wales was joined by his wife, Princess Kate – her first public appearance since the announcement of her cancer diagnosis.
Also with them were their three children, Prince George, Princess Charlotte and Prince Louis, the youngest of whom is no stranger to the spotlight at such events.