Mohammed bin Salman Al Saud (Arabic: محمد بن سلمان آل سعود, romanized: Muḥammad bin Salmān Āl Su‘ūd; born 31 August 1985), colloquially known by his initials MBS or MbS, is Crown Prince and Prime Minister of Saudi Arabia. He also serves as the chairman of the Council of Economic and Development Affairs and chairman of the Council of Political and Security Affairs. He is considered the de facto ruler of Saudi Arabia, being deemed as such even before his appointment as prime minister in 2022. He served as minister of defense from 2015 to 2022. He is the seventh son of King Salman.