Step 1 : Introduction to the question "Robert Duvall made his film debut as Boo Radley in what 1962 movie?"
...Before starring in "The Godfather," "Apocalypse Now," and "The Apostle," Robert Duvall played Boo Radley in the 1962 film adaptation of "To Kill a Mockingbird." Based on the acclaimed Harper Lee novel, the movie earned Gregory Peck an Academy Award for his performance as Atticus Finch, and was further nominated for seven other Oscars. In 2007, the American Film Institute named it the 25th best American movie of all time.