Klaus Hagerup (5 March 1946 – 20 December 2018) was a Norwegian author, translator, screenwriter, actor and director. He debuted with the poem collection "Slik tenker jeg på dere" ("This is how I think about you") in 1969. During 1968–69 he worked at the Bergen theatre Den Nationale Scene.
In 1988 he wrote a biography "Alt er så nær meg" ("Everything is so close to me") about his famous mother, Inger Hagerup. He won several literature awards for his books, including the Brage Prize in 1994.