Princess Elizabeth Alexandra Mary was born on 21 April 1926 at her maternal grandparents' home at 17 Bruton Street, in London's Mayfair district, and was not expected to accede to the throne.

1926年4月21日，伊丽莎白·亚历山德拉·玛丽公主出生在她外祖父母位于伦敦梅菲尔区布鲁顿街17号的家中，当时人们并不认为她会继承王位。