Klaus Kinski (German: [klaʊs ˈkɪnski]; born Klaus Günter Karl Nakszynski 18 October 1926 – 23 November 1991) was a German actor. Equally renowned for his intense performance style and his notoriously eccentric and volatile personality off-screen, he appeared in over 130 film roles in a career that spanned 40 years, from 1948 to 1988. He is best known for starring in five films directed by Werner Herzog from 1972 to 1987 (Aguirre, the Wrath of God; Nosferatu the Vampyre; Woyzeck; Fitzcarraldo; and Cobra Verde), who would later chronicle their tumultuous relationship in the documentary My Best Fiend.

Kinski's roles spanned multiple genres, languages, and nationalities, including Spaghetti Westerns, horror films, war films, dramas, and Edgar Wallace krimi films. His infamy was elevated by a number of eccentric creative endeavors, including a one-man show based on the life of Jesus Christ, a biopic of violinist Niccolò Paganini directed by and starring himself, and over twenty spoken word albums.

Kinski was prone to emotional and often violent outbursts aimed at his directors and fellow cast members, issues complicated by a history of mental illness. Herzog described him as "one of the greatest actors of the century, but also a monster and a great pestilence." Posthumously, he was accused of having physically and sexually abused his daughters Pola and Nastassja. His notoriety and prolific output have developed into a widespread cult following and a reputation as a popular icon.

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