Tengku Muhammad Fa-iz Petra ibni Almarhum Sultan Ismail Petra (born 20 January 1974) is the current Tengku Mahkota (Crown Prince) of the Malaysian state of Kelantan, heir presumptive and first in line of succession to the throne of Kelantan. He was proclaimed as the Crown Prince of Kelantan on 18 October 2010 upon the accession of his elder brother, Sultan Muhammad V as the 29th Sultan of Kelantan.