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In this 1921 photo provided by the Royal Collection shows Prince Philip of Greece, later to become the Duke of Edinburgh, being held by his mother Princess Alice of Greece, as part of the Prince Philip exhibition opening today at Windsor Castle, England Image Credit: AP

London:  Three photographs of Prince Philip, never seen before by the public, are showing at a new exhibition celebrating his 90th year.

The exhibition, opening today at Windsor Castle, opens with the first photograph taken of the infant Philip, who later became the husband of the present Queen Elizabeth II.

The black and white print shows Philip as a newborn in the arms of his mother Princess Alice of Greece.

Another print from 1922 shows the prince holding up himself on the table while a third image shows Philip in his school photograph in 1933.

The photo was taken after his family went into exile following a military coup in Greece.

Philip, the oldest serving spouse of a reigning monarch, announced last year he would stepping down from some of his duties.