She was the daughter of Grand Duke Konstantin Nikolayevich of Russia, and so she was a granddaughter of Tsar Nicholas I and first cousin of Tsar Alexander III.
She got married to the new king of greece when she was sixteen!
She was still so young that when she went to Greece for the first time, she took a chest full of her favorite dolls.
Olga was politically savvy though. When she embarked from the boat, she wore a gown with the colors of the Greek flag and the crowds went wild. She was loved from day one. It also helped she was Orthodox, too.
I remember Prince Michael of Greece sharing that story on "A Royal Family.' Have you seen that series Michelle?