Abu Musa Muhammad ibn Harun al-Rashid (; April 787 – 24/25 September 813), better known by his regnal name of al-Amin (), was the sixth Arab Abbasid Caliph. He succeeded his father, Harun al-Rashid, in 809 and ruled until he was deposed and killed in 813, during the civil war by his half-brother, al-Ma'mun.