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July 1936: Princess Elizabeth hugging a corgi dog. (Photo by Lisa Sheridan/Studio Lisa/Hulton Archive/Getty Images)

July 1936:  Princess Elizabeth hugging a corgi dog.  (Photo by Lisa Sheridan/Studio Lisa/Hulton Archive/Getty Images)

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Princess Elizabeth (now Queen Elizabeth II) with two corgi dogs at her home at 145 Piccadilly, London, July 1936. (Photo by Lisa Sheridan/Studio Lisa/Hulton Archive/Getty Images)

Princess Elizabeth (now Queen Elizabeth II) with two corgi dogs at her home at 145 Piccadilly, London, July 1936. (Photo by Lisa Sheridan/Studio Lisa/Hulton Archive/Getty Images)

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Princess Elizabeth in the grounds of her London home, 145 Piccadilly with a pet dog. (Photo by Lisa Sheridan/Getty Images)

Princess Elizabeth in the grounds of her London home, 145 Piccadilly with a pet dog.   (Photo by Lisa Sheridan/Getty Images)