What was Robert Duvall's film debut?

Robert Duvall’s film debut was Boo Radley in To Kill a Mockingbird (1962).

What was George Lucas’s last film as a director? George Lucas's last film as a director was Star Wars (1977).
Who was the “King of Daredevil Comedy”? Harold Lloyd, whose best-known movie is Safety Last (1923), was the "King of Daredevil Comedy".
Who introduced the use of “subjective sound”, a voice-over showing what a character is thinking? Director Rouben Mamoulian in City Streets (1931) introduced the use of "subjective sound", a voice-over showing what a character is thinking. While Sylvia Sidney lay alone in bed, she "remembered" what Gary Cooper…
What was Bette Davis’s film debut? Bad Sister (1931) was Bette Davis's film debut.
What was Katharine Hepburn’s film debut? Katharine Hepburn's film debut was A Bill of Divorcement (1932).
What was Bernard Herrmann’s final movie score? Bernard Herrmann's final movie score was the Oscar-winning score was for Taxi Driver (1976).