Knut Utstein Kloster (2 April 1929 – 20 September 2020) was a Norwegian shipping magnate. His grandfather, Lauritz Kloster, founded Kloster Rederi in 1924. In 1959, Kloster joined the family business and transformed it into a leading cruise line. Together with Ted Arison, he founded Norwegian Caribbean Line in 1966. The idea for MS The World originated with him.

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