Princess Irene of Greece and Denmark

Princess Irene of Greece and Denmark was the youngest child and second daughter of King Paul of Greece and his wife, Queen Frederica. She was the younger sister of Queen Sofía of Spain and King Constantine II of Greece. In the 1960s, she briefly had a career as a professional pianist. From 1981 until her death, Irene lived permanently in Spain, becoming a part of the wider Spanish royal family as Queen Sofía's sister, to whose family she remained very close. In 2018, she renounced her Greek citizenship and obtained Spanish nationality.