Princess Alexandra of Greece and Denmark ; 30 August [O.S. 18 August] 1870 – 24 September [O.S. 12 September] 1891), later known as Grand Duchess Alexandra Georgievna of Russia, was a member of the Greek royal family and of the Russian imperial family. She was the daughter of George I of Greece and Olga Constantinovna of Russia. She died of childbirth complications.

Olga Constantinovna of Russia was Queen of Greece as the wife of King George I. She was briefly the regent of Greece in 1920.