Tuanku Syed Sirajuddin ibni Almarhum Tuanku Syed Putra Jamalullail is the current Raja of Perlis, reigning since 17 April 2000. He served as the 12th Yang di-Pertuan Agong (Supreme Head of State of Malaysia) from 13 December 2001 to 12 December 2006 and 7th Raja of Perlis since 2000.
Tuanku Syed Sirajuddin was born in Arau, Perlis, the second of ten children of HRH Almarhum Tuanku Syed Putra Jamalullail and Tengku Budriah binti Almarhum Tengku Ismail. In October 1960, he was appointed the Raja Muda (Crown Prince) of Perlis while still a student. Tuanku Syed Sirajuddin ibni Almarhum Tuanku Syed Putra Jamalullail was installed as the twelfth ruler of Perlis on 17 April 2000, the day after the death of his father, Tuanku Syed Putra ibni Almarhum Syed Hassan Jamalullail, who had been Raja since 1945, and was at that time the world's longest reigning monarch.
Tuanku Syed Sirajuddin was elected the 12th Yang di-Pertuan Agong of Malaysia on 13 December 2001. This was earlier than expected because the Sultan of Selangor and the previous 11th Yang di-Pertuan Agong, Almarhum Sultan Salahuddin Abdul Aziz Shah Al-Haj ibni Almarhum Sultan Sir Hisamuddin Alam Shah Al-Haj, died on 21 November 2001 while his term should have ended in 2004. Tuanku Syed Sirajuddin's term ended on 12 December 2006.