Mohammed bin Salman Al Saud, 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.

Mohammed was born as the first child of Prince Salman bin Abdulaziz and his third wife, Fahda bint Falah Al Hithlain. After obtaining a law degree from King Saud University, he served as an advisor to his father. After Salman became king, he appointed Mohammed defense minister and deputy crown prince in 2015. Mohammed was promoted to crown prince after the dismissal of Crown Prince Muhammad bin Nayef, King Salman's nephew, in 2017. Salman ceded the position of prime minister to his son in 2022.