World's most glamorous royals: Monaco's first family dazzle in ballgowns

Prince Albert II of Monaco poses with Beatrice and Pierre Casiraghi, Princess Alexandra of Hanover, Princess Caroline of Hanover, Charlotte, Tatiana and Andrea Casiraghi and German designer Karl Lagerfeld at Monte Carlo Sporting for the Bal de la Rose in Monaco. (Reuters)

Princess Caroline of Hanover's children, Charlotte Casiraghi, Princess Alexandra of Hanover, Pierre Casiraghi and his wife Beatrice arrive at Monte Carlo Sporting. (Reuters)

Princess Alexandra of Hanover. (Reuters)

Prince Albert II of Monaco poses with Pierre Casiraghi, Princess Alexandra of Hanover, Princess Caroline of Hanover and Charlotte Casiraghi at Monte Carlo Sporting. (Reuters)

Prince Albert II of Monaco and his sister Princess Caroline of Hanover pose with German designer Karl Lagerfeld at Monte Carlo Sporting. (Reuters)

Princess Caroline of Hanover's children, Charlotte Casiraghi and Princess Alexandra of Hanover. (Reuters)

Pierre Casiraghi, Princess Caroline of Hanover's son, arrives with his wife Beatrice at Monte Carlo Sporting. (Reuters)

Prince Albert II of Monaco and his sister Princess Caroline. (Reuters)

Princess Caroline of Hanover and her daughter Charlotte Casiraghi. (Reuters)

A view of the table where Princess Caroline of Hanover is to be seated in the "salle des etoiles" is seen at the Monte Carlo Sporting for the Bal de la Rose in Monaco. (Reuters)

Prince Albert II attends The 62nd Rose Ball To Benefit The Princess Grace Foundation at Sporting Monte-Carlo. (Getty Images)