HRH the Princess Alexandra Charlotte Ulrike Maryam Virginia of Hanover is the only child of HRH the Prince Ernst August of Hanover and his wife Princess Caroline, heiress presumptive to the throne of Monaco. She has half-siblings from each of her parents' previous marriages.

Through her father, she is descended from King George III of the United Kingdom and from Emperor Wilhelm II of Germany. Through her mother, she is descended from Prince Rainier III of Monaco and Grace Kelly.

The full titles claimed for her are Princess of Hanover, Duchess of Brunswick and Lüneburg, and Princess of Great Britain and Ireland; however both Germany and Ireland are republics. She was born 20 July 1999 in Vöcklabruck , Austria six months after her parents' marriage.

She is, currently, the only one of Princess Caroline's four children who bears a royal title, and she is presently fifth in line to the throne of Monaco. She is the third in the line of succession within the house of Hanover.