Stig Kjell Olof "Ola" Ullsten (23 June 1931 – 28 May 2018) was a Swedish politician and diplomat who was Prime Minister of Sweden from 1978 to 1979 and leader of the Liberal People's Party from 1978 to 1983.

[2] Stig Kjell Olof Ullsten[3] was born in Teg, Västerbotten, a small town that would ultimately be annexed as a part of county capital Umeå.

[5] In his youth he made several travels to the United States, and in 1959 took an active part in the successful campaign to elect liberal Republican Nelson Rockefeller governor of New York.

Upon the formation in 1976 of the first non-socialist government in Sweden in 40 years, he was appointed Minister for International Development.

After the successful survival of the coalition in the 1979 parliamentary elections, he resigned as prime minister in favor of Thorbjörn Fälldin, his predecessor.