Mir Hidayat Muhi-ud-din Sa'adullah Khan is the ruler of Hyderabad briefly, from 1750 to his death in battle in 1751.

He was born to Nawab Talib Muhi ud-din Mutawassil Khan Bahadur who was the Naib Subahdar (Deputy Governor) of Bijapur and his wife Sahibzadi Khair-un-nisa Begum who was the daughter of Nizam-ul-Mulk.

He was also given a very pompous title like his predecessor and rival Nasir Jung; it was Nawab Khan Bahadur, Muzaffar Jung, Nawab Subadar of the Deccan, but he becomes famously known as Muzaffar Jung.