• Royals Elizabeth II of England: the day the Queen took off her crown to act as a mother

A series of

photographs on the beach of Prince Louis

have been released on the occasion of the

fourth birthday of the youngest son of the Dukes of Cambridge, William and Catherine.

The pictures were

taken by his mother

earlier this month on a beach on the coast of the English county of Norfolk, and they show the

smiling boy running and posing for the camera while holding a cricket ball.

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Last year,

the dukes already published another photograph of their young son

cycling to the nursery for the first time when he turned three years old.

On this occasion,

the prince

, fifth in the line of succession to the British crown (after his grandfather, Prince Charles; his father, Prince William, and his

older brothers

, Prince George and Princess Charlotte) wears a gray sweater with colored stars and blue shorts.

Luis was born in the Lindo maternity wing of St Mary's private hospital in London on April 23, 2018.

It is already common for

the Duchess of Cambridge to disclose photos taken by herself

on her children's birthdays.

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