Sultanah Nur Diana Petra Abdullah is a Czech-born who is the current Sultanah of Kelantan and a member of the Kelantan royal family as the wife of Sultan Muhammad V, the current Sultan of Kelantan.

Sultan Muhammad V is the 29th Sultan of Kelantan since ascending to the throne in 2010. He previously reigned as the fifteenth Yang di-Pertuan Agong of Malaysia from 2016 until his abdication in 2019.