Shahbanu (in Persian: شهبانو) means Empress in Persian. It was a title that was only conferred on the third wife of Muhammad Reza Shah, Farah Diba in 1967. She was the first Empress to be crowned in Iran, excluding the two Sassanian empresses Purandokht and Azarmidokht circa 630 A.D. Previous wives of Iranian Emperors were known as Malika or Queen.
The Shah's third wife was Farah Diba (born October 14, 1938), daughter of Sohrab Diba, Captain in the Imperial Iranian Army, and his wife, Faredeh Ghotbi.
They were married in 1959, and Farah was created Shahbanu, or Empress, a title created especially for her.
Farah Diba bore him four children: Farah DibaFarah Diba (born October 14, 1938 in Tehran, Iran) (also known as Farah Pahlavi) was the third wife of Mohammad Reza Pahlavi of Iran and the Shahbanu (Empress) of Iran.