Margaret Elizabeth More was born in Harlech on June 26th 1903, to parents William Henry More and Alice. She had much older siblings, Constance, Jack, Frank, Evelyn and eventually a younger brother, George. The family home was Crown Lodge, in Harlech on the rugged Welsh Coast. Margaret was a great deal younger than the next eldest sister Evelyn, and was undoubtedly an unplanned child. As the girls did not attend school, they instead had a governess, with whom Margaret studied music. Margaret was a natural rebel, and the boredom of life away from a big city necessitated that the siblings created their own entertainment.