| Tunku Alif Hussein Saifuddin Al-Amin Malay: {{Script|Arab|تونكو اليف حسين سيف الدين الأمين | |
| Father: | Tuanku Muhriz ibni Almarhum Tuanku Munawir |
| Mother: | Tuanku Aishah Rohani binti Almarhum Tengku Besar Mahmud |
| Full Name: | Tunku Alif Hussein Saifuddin Al-Amin ibni Tuanku Muhriz |
| Birth Date: | 3 September 1984 |
| Birth Place: | Kuala Lumpur Hospital, Kuala Lumpur, Malaysia |
| Death Place: | Hospital Canselor Tuanku Muhriz, Kuala Lumpur |
| Burial Place: | Seri Menanti Royal Mausoleum, Kuala Pilah, Negeri Sembilan |
| Dynasty: | Pagaruyung |
| Religion: | Sunni Islam |
Tunku Alif Hussein Saifuddin Al-Amin ibni Tuanku Muhriz (Jawi: Malay: {{Script|Arab|تونكو اليف حسين سيف الدين الأمين ابن توانكو محرز), (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 Kuala Lumpur Hospital, 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.
His siblings were:
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 buried at the Seri Menanti Royal Mausoleum, Kuala Pilah.[2]