Øystein Wiik (born 1956) is a Norwegian actor, singer, songwriter and novelist. He was born in Oslo. He has worked for Den Nationale Scene, Oslo Nye Teater and Det Norske Teatret, and played leading roles in several musicals. Among his albums are Too many mornings from 1991 and Stage from 1993. He published the crime novel Dødelig applaus in 2010.