Tengku Muhammad Ismail

On 30 August 2010, upon reaching age 12 (baligh, the Islamic age of puberty), Tengku Muhammad Ismail was formally installed as Regent during a ceremony at Istana Maziah. A Regency Representative Council was formed to discharge his duties as regent while he left the country to pursue his studies. The council consisted of Sultan Mizan's brother Tengku Mustaffa Kamel, and previous members of the Regency Advisory Council, Tengku Sulaiman and Abdul Kadir Sulaiman.

Like his father, Tengku Muhammad Ismail is an equestrian, and has participated in international events. In June 2010, he finished in second place in the 90 km race at the RTES/D'Armor French Open in Corlay.

As regent, he presided over the swearing in of Menteri Besar Ahmad Said following the 2008 general election.

He was appointed Yang di-Pertuan Muda (Crown Prince) on 12 January 2006.

After Sultan Mizan was elected as Yang di-Pertuan Agong, he appointed Tengku Muhammad Ismail, then aged eight, as Regent on 12 November 2006. Because of Tengku Muhammad Ismail's young age, a Regency Advisory Council was established to discharge his duties for him. The council's members were Raja Tengku Baderulzaman, Sultan Mizan's younger brother, Raja Tengku Sulaiman Sultan Ismail, Sultan Mizan's uncle, and Federal Court judge Abdul Kadir Sulaiman. He was proclaimed as regent during a ceremony on 12 December.

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

Tengku Muhammad Ismail was born on 1 March 1998 as the eldest son and second child of Tengku Mizan Zainal Abidin, the Yang di-Pertuan Muda (Crown Prince) of Terengganu, and Sultanah Nur Zahirah. His father became the Sultan of Terengganu shortly after his birth, after which his mother became known as Permaisuri Nur Zahirah.