To be a “Shi‘at Ali” means to follow closely in the footsteps of ‘Ali, the cousin and son-in-law of Prophet Muhammad. For Shi‘is, ‘Ali was the rightful successor of Prophet Muhammad and the first Imam. Shi‘ism is the second largest denomination in Islam after Sunnism. Shi‘is constitute roughly 10–20% of all Muslims in the world. This chapter provides an overview of contemporary Shi‘is doctrines, bodily pious habits, as well as quotidian and annual rituals.