Queen Mary A Great Grandmother Son Born To Princess Elizabeth -- With tears in her eyes, Queen Mary, now a great grandmother, acknowledging the cheers of the frenzied mob. Queen Mary became a great grandmother this evening by the birth of a Prince to Princess Elizabeth. One of the first to congratulate Princess Elizabeth, Queen Mary's car was mobbed by yelling crowds as she left Buckingham Palace for Marlborough House this evening. The car was forced to a standstill and there were tears in her eyes. She then waved and smiled to the cheering crowds. November 14, 1948. (Photo by Reuterphoto).