Tunku Zain Al-'Abidin ibni Tuanku Muhriz (born 6 July 1982), more popularly known as Tunku 'Abidin Muhriz, is the second son of the reigning Yang di-Pertuan Besar of Negeri Sembilan in Malaysia, Tuanku Muhriz ibni Almarhum Tuanku Munawir and the reigning Tunku Ampuan Besar of Negeri Sembilan,Tuanku Aishah Rohani binti Tengku Besar Mahmud. He is the Founding President of the Institute for Democracy and Economic Affairs (IDEAS), Malaysia and is a trustee of Yayasan Chow Kit along with Yayasan Munarah.