Mohammad bin Salman bin Abdulaziz Al Saud (Arabic: محمد بن سلمان بن عبد العزيز آل سعود‎‎; born 31 August 1985), also known as MBS, is the Crown Prince of Saudi Arabia, First Deputy Prime Minister of Saudi Arabia and the youngest minister of defense in the world. Mohammad bin Salman is also president of the Council for Economic and Development Affairs. He has been described as the power behind the throne of his father, King Salman. He was appointed Crown Prince in June 2017 following his father's decision to remove Muhammad bin Nayef from all positions, making Mohammad bin Salman heir apparent to the throne.

Mohammad bin Salman Al Saud was born on 31 August 1985 in Jeddah. He is the son of King Salman from his third spouse, Fahda bint Falah bin Sultan bin Hathleen. She is the granddaughter of Rakan bin Hithalayn, who was the head of the Al Ajman tribe.

Prince Mohammad bin Salman is the eldest of his full siblings and is the brother of Turki bin Salman, former chairman of the Saudi Research and Marketing Group. Prince Mohammad holds a bachelor's degree in law from King Saud University.

After graduating from college, Mohammad bin Salman spent several years in the private sector before becoming the personal aide of his father. He worked as a consultant for the Experts Commission, working for the Saudi Cabinet.

On 15 December 2009, Mohammad bin Salman entered politics as a special advisor to his father when the latter was the governor of Riyadh Province. At this time, Prince Mohammad bin Salman began to rise from one position to another such as secretary-general of the Riyadh Competitive Council, special advisor to the chairman of the board for the King Abdulaziz Foundation for Research and Archives, and a member of the board of trustees for Albir Society in the Riyadh region.

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