Earlier on Sunday, external, William posted his own Father’s Day tribute, to his father, King Charles III.
The prince shared a photograph of himself as a child, playing football with the King in the gardens of Kensington Palace.
Taken on 12 June 1984, the then nearly two-year-old prince can be seen smiling while kicking a brightly coloured football.
A few months after the picture was taken, William’s younger brother would be born – the Duke of Sussex.
The post is personally signed off by the prince, with the caption: “Happy Father’s Day, Pa.”
As well as marking Father’s Day, it’s also a potential nod to the England football team, who start their Euro 2024 campaign later on Sunday.