As the longest-serving British monarch, Queen Elizabeth II has witnessed tremendous changes in her seventy years of service.

A world war, 14 prime ministers, the first man on the moon and the birth of the internet – these are only some of the major developments she has seen.

But today we are stepping back in time to the 1920s and 1930s with these heartwarming pictures of Her Majesty as a princess before she became queen.

She was born Princess Elizabeth Alexandra Mary in the early hours of April 21, 1926, at 17 Bruton Street, in Mayfair, London.

The first child of the Duke and Duchess of York, who later became King George VI and Queen Elizabeth, she was joined in the family household by her sister, Princess Margaret, four years later.

Please enjoy these old photos of the Queen when she was Princess Elizabeth as a celebration of her life and service in this historic Platinum Jubilee year.

As Her Majesty celebrates her record-breaking reign we have delved into our archives to create a tribute to her life and 70 years of service. Filled with photos and history, Our Queen's Platinum Reign is a magazine we hope readers will treasure for years to come. This special souvenir is available for £9.99 online and in-store.

Order online by clicking this link Find shops stocking the magazine near you by heading over to Select 'Our Queens Platinum Reign' from the drop-down menu along with your postcode and radius.