Karlheinz Böhm  (born 16 March 1928 in Darmstadt, Germany) is an Austrian actor. The son of conductor Karl Böhm, he is best known internationally for his role as Mark, the psychopathic protagonist of Peeping Tom, directed by Michael Powell. Before that, he had played the young Emperor Franz Joseph I of Austria in the three Sissi movies. He made three notable U.S. films in 1962. He played Jakob Grimm in the 1962 MGM-Cinerama spectacular The Wonderful World of the Brothers Grimm and Ludwig van Beethoven in the Walt Disney film The Magnificent Rebel. (The latter film was made especially for the Disney anthology television series, but was released theatrically in Europe.) He appeared in a villainous role as the Nazi-sympathizing son of Paul Lukas in the MGM film Four Horsemen of the Apocalypse, a Technicolor, widescreen remake of the 1921 silent Rudolph Valentino film. Between 1974 and 1975, Böhm appeared prominently in four consecutive films from prolific New German Cinema director Rainer Werner Fassbinder: Martha, Effi Briest, Faustrecht der Freiheit (aka Fistfight of Freedom or Fox and His Friends), and Mutter Küsters' Fahrt zum Himmel (Mother Küsters' Trip to Heaven). In 2009 he provided the German voice for Charles Muntz, villain in Pixar's tenth animated feature Up.

• Peeping Tom (1960)

  
• The Four Horsemen of the Apocalypse (1962)

  
• Martha (1974)

  
• Faustrecht der Freiheit (1975)

  
• The Venetian Affair (1967)