الدين المصطفى بالله شاه الحاج ابن المرحوم سلطان حاج احمد شاه المستعين بالله) (born 30 July 1959) is the 16th "Yang di-Pertuan Agong" (head of state) of Malaysia and the sixth Sultan of Pahang. He was made Sultan on 15 January 2019, replacing his father, Sultan Ahmad Shah on 11 January.