Karin Cecilie "Kaci" Kullmann Five (ˈkɑːsɪ ˈkʉlːmɑn ˈfiːvə; 13 April 1951 – 19 February 2017) was a Norwegian politician for the Conservative Party. She served as a member of parliament from 1981 to 1997, as Minister of Trade and Shipping in the Ministry of Foreign Affairs from 1989 to 1990 and as leader of the Conservative Party from 1991 to 1994. After she left politics in 1997, she held roles in private business, ran her own consultancy and was a board member of Statoil and other companies and organisations.
She was elected by the Storting as a member of the Norwegian Nobel Committee in 2003, became a board member of the Nobel Foundation in 2009 and served as chairwoman of the Norwegian Nobel Committee from 2015 until her death; in this capacity she was responsible for awarding the Nobel Peace Prize.
Five was born Karin Cecilie Kullmann in Bærum, the daughter of a dentist, and was better known by the nickname "Kaci" (kasi). After finishing upper secondary school at Nadderud in 1969 she was educated in law, French language and political science, and graduated with the cand.polit. degree in political science at the University of Oslo in 1981. Before she entered politics she was a consultant at the Norwegian Confederation of Norwegian Enterprise (NHO). In 1972 she married Carsten O. Five, former editor of the finance magazine Dine Penger. They have two children.
In early 2014, she was diagnosed with breast cancer and began treatment for it. While her initial prognosis was good, the illness worsened, and in 2016 she had to cancel several appearances.
Five died on 19 February 2017 from breast cancer, aged 65.
Five was member of the municipal council of Bærum 1975–81 and then served as deputy leader of the executive committee for Education. From 1977 to 1979 she was the first female President of the Norwegian Young Conservatives.
She was a member of the Norwegian parliament, the Storting, from 1981 to 1997. She was Deputy Chairwoman of the Conservative Opposition 1986–1989, and again 1990–1991.