Princess Caroline
Member of the Monaco royal family, she is the first-born daughter of Grace Kelly. She was heir to the throne for over a year before her brother, Prince Albert II, was born. She regained her official princess status in her third marriage to Ernst August, Prince of Hanover.
Princess Soraya of Iran
After Tawzia of Egypt divorced her husband, the Shah remarried Princess Soraya. She was instantly named Queen of Iran upon their marriage. This marriage, however, also ended in divorce due to Soraya's infertility. She later moved to France to become an actress.