Max von Sydow, 90, the Swedish-born actor who had a prolific career on stage, screen and television, including an important early role in the American Film Institute’s “100 Years, 100 Movies” list, died on Sunday in a hospital in Lund, Sweden. His son, Ludwig von Sydow, said the cause was complications of pneumonia. Widely considered one of the greatest living actors, Mr. von Sydow was known for the gravitas and intelligence he brought to his characters, often in critically acclaimed or cult-favorite films. He was nominated for two Academy Awards, for “Pelle the Conqueror” (1988) and “Extremely Loud and Incredibly Close” (2011), and won a Golden Globe for his performance in the latter. He also had a long and fruitful relationship with Ingmar Bergman, appearing in 10 of the Swedish master’s films, including “The Seventh Seal” (1957), “Wild Strawberries” (1957), “The Virgin Spring” (1960) and “The Touch” (1971), which Mr. von Sydow also directed. He frequently worked with Lars von Trier as well, appearing in “The Kingdom” (1994), “Dogville” (2003) and “Melancholia” (2011). In a career that spanned more than 70 years, Mr. von Sydow also starred in the well-known American films “The Exorcist” (1973), “ Flash Gordon” (1980), “Minority Report” (2002) and “Extremely Loud and Incredibly Close.” He was born Carl Max von Sydow on April 10, 1929, in Lund, Sweden, the son of a Lutheran minister. After studying at the Royal Dramatic Theater School in Stockholm, he made his stage debut in 1948. He first gained notice in the United States in the early 1950s with his stage work in New York, including a production of “Hamlet” that was directed by John Gielgud. In a career that spanned more than 70 years, Max von Sydow also starred in the well-known American films “The Exorcist,” “ Flash Gordon,” “Minority Report” and “Extremely Loud and Incredibly Close.” He is survived by his wife, Christina, their children, Ludwig and actress 1992-born EA von Sydow, and seven grandchildren.