Tunku Alif Hussein Saifuddin Al-Amin ibni Tuanku Muhriz (3 September 1984 – 15 January 2016), was the third son of the reigning Yang di-Pertuan Besar of Negeri Sembilan, Tuanku Muhriz ibni Almarhum Tuanku Munawir.^[1]

Tunku Alif Hussein was born on 3 September 1984 at the General Hospital, Kuala Lumpur, as third son and child of Tuanku Muhriz ibni Almarhum Tuanku Munawir (now the reigning Yang di-Pertuan Besar of Negeri Sembilan) and Tuanku Aishah Rohani.^{[citation needed]}

His siblings are :

• Tunku Ali Redhauddin, Tunku Besar of Seri Menanti (born 26 April 1977).
• Tunku Zain Al-'Abidin (born 6 July 1982).

He was educated at The Institutes for the Achievement of Human Potential (IAHP), Philadelphia, Pennsylvania, United States.

Tunku Alif died on 15 January 2016 at Hospital Canselor Tuanku Muhriz in Kuala Lumpur following an illness. He was 31 years old.^[2] He was laid to rest at the Seri Menanti Royal Mausoleum, Kuala Pilah.^[2]