Hassan Diab is a Lebanese academic, engineer and politician who served as the 26th prime minister of Lebanon from 21 January 2020 to 10 September 2021. He was appointed by President Michel Aoun in 2019 to succeed Saad Hariri as prime minister. He submitted his resignation on 10 August 2020 in wake of the 2020 Beirut explosion and served as caretaker prime minister until Najib Mikati formed a new government on 10 September 2021. Prior to his premiership, he served as the minister of education from June 2011 to February 2014 under President Michel Suleiman.