Princess Alexandra of Hanover took to her Instagram to share personal photos from this year's Rose Ball, including a snapshot with her sister Charlotte Casiraghi.

Princess Charlene, Princess Alexandra and Charlotte Casiraghi led the most exquisitely-dressed guests at the annual ball ...

Meet the little-known royals in Coronation photo - 'invisible' husband and oldest duke ...

Princess Alexandra was born on December 25, 1936 and was the second child of Prince George, Duke of Kent and Princess Marina of Greece and Denmark. She was given the middle name 'Christabel ...

The Norwegian royal, 21, joined her parents, Crown Prince Haakon and Crown Princess Mette-Marit, both 51, at the white-tie soiree at the Royal Palace in Oslo as King Harald and Queen Sonja hosted ...

SC Pool - Corbis//Getty Images Princess Alexandra of Hanover, Charlotte Casiraghi, Beatrice Borromeo, and Andrea Casiraghi. VALERY HACHE//Getty Images Ben Sylvester Strautmann, Princess Alexandra ...

Princess Alexandra of Denmark would lose her title and tax-free income if she marries after divorcing Prince Joachim, according to an agreement she signed. Princess Alexandra, The Honourable Lady ...