Claim: To Kill a Mockingbird (film) was the film debut of an American actor who died in 2012.
Evidence: To Kill a Mockingbird marked the film debuts of Robert Duvall , William Windom , and Alice Ghostley.
William Windom -LRB- September 28 , 1923 -- August 16 , 2012 -RRB- was an American actor.