Tengku Muhammad Faiz Petra is the current Tengku Mahkota or heir presumptive to the throne of Kelantan. He was appointed to the position on October 18, 2010.
Tengku Muhammad is the second of four children of the former Sultan of Kelantan, Sultan Ismail Petra. His two younger siblings are Tengku Muhammad Fakhry Petra and Tengku Amalin Aishah Putri. His elder brother is the current Sultan of Kelantan, Sultan Muhammad V.
Tengku Muhammad was born at Istana Kota Lama, Kelantan on June 20, 1974. He was appointed Tengku Bendahara Kelantan on March 30, 1989 and is the head of the Kelantan Islamic Religious and Malay Customs Council since June 21, 2009.
Tengku Muhammad was elevated to the position of Tengku Mahkota upon deliberation of the Terengganu State Council of Succession which was chaired by Tengku Abdul Halim Al-Haj Ibni Almarhum Sultan Ibrahim. The ceremony to present the letter of appointment as Tengku Mahkota Kelantan was held at Istana Negeri in Kubang Kerian.
According to the Kelantan State Constitution, Tengku Muhammad Faiz could be the ruler or regent when the Sultan is abroad for a period of more than 12 months or unable to carry to out his duties as the ruler over the same period.