Lee Beom-seok, also known by his art name Cheolgi, was a Korean independence activist and the first prime minister of South Korea from 1948 to 1950. He also headed the Korean National Youth Association.

The prime minister of the Republic of Korea is the deputy head of government and the second highest political office of South Korea who is appointed by the President of the Republic of Korea, with the National Assembly's approval. The prime minister may be a member of the National Assembly, but this is not required to hold the office. The prime minister of South Korea is not the head of government of South Korea, for the President is both the head of state and government in the country.