Claim: To Kill a Mockingbird (film) was the film debut of an American producer and filmmaker born in 1931.
Evidence: To Kill a Mockingbird marked the film debuts of Robert Duvall , William Windom , and Alice Ghostley.
Robert Selden Duvall -LRB- -LSB- duːˈvɔːl -RSB- born January 5 , 1931 -RRB- is an American actor and filmmaker.