From Wikipedia, the free encyclopedia Mary Badham (born October 7, 1952) is an American actress, known for her portrayal of Jean Louise 'Scout' Finch in To Kill a Mockingbird (1962), for which she was nominated for an Academy Award for Best Supporting Actress. At the time, Badham (age 10) was the youngest actress ever nominated in this category. Mary Badham is the younger (by thirteen years) sister of film director John Badham. The Badham siblings, however, have never worked together on the sa ...