Tengku Muhammad Fa-iz Petra ibni Almarhum Sultan Ismail Petra (born 20 January 1974) is the current Tengku Mahkota (Crown Prince) of Kelantan.
He was proclaimed as Tengku Mahkota of Kelantan on 18 October 2010 upon the accession of his elder brother, Sultan Muhammad V as the 29th Sultan of Kelantan.He is the second of four children of the late Sultan of Kelantan, Sultan Ismail Petra and Raja Perempuan Tengku Anis.
His two younger siblings are Tengku Muhammad Fakhry Petra and Tengku Amalin Aishah Putri.
His eldest brother is the Sultan of Kelantan, Sultan Muhammad V, the fifteenth Yang di-Pertuan Agong.