Dutch Princess Margriet turned 80 today. On the occasion of the 80th birthday, Dutch Royal Court (RVD) released new photos of Princess Margriet. Princess Margriet was born at the Civic Hospital in Ottawa on 19 January 1943. The Princess has three sisters, Princess Beatrix, Princess Irene and Princess Christina. Princess Margriet is married to Professor Pieter van Vollenhoven and they have four children.