Tengku Muhammad Ismail ibni Al-Wathiqu Billah Sultan Mizan Zainal Abidin (born 1 March 1998) is the Yang di-Pertuan Muda (Crown Prince) of Terengganu. He is the son of the current Sultan of Terengganu, Sultan Mizan Zainal Abidin and Sultanah Nur Zahirah, the Sultanah of Terengganu. He also was appointed as Regent of the state from 2006 to 2011 during his father's term as Yang di-Pertuan Agong (the elective federation monarch) of Malaysia.
