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Younger sister (by 14 years) of director John Badham. Remained friends with Gregory Peck after the filming of To Kill a Mockingbird (1962) and still called him Atticus. after Peck's character in the film). Keeps in touch with Phillip Alford (her screen brother, "Jem") and Brock Peters ("Tom Robinson", the accused). Second best-known role, after To Kill a Mockingbird (1962), is as Sport Sharewood in the classic "The Twilight Zone" (1959) episode "The Bewitchin' Pool," written by Earl Hamner Jr. ("The Waltons" (1972)), and first aired in 1964. Lost the "supporting actress" Oscar to another child actress: Patty Duke for The Miracle Worker (1962). At present she is an art restorer and a college testing coordinator. She also travels around the world recalling her wonderful experiences making To Kill a Mockingbird (1962) while expounding on the book's messages of tolerance and compassion. Had no acting experience prior to getting a role in To Kill a Mockingbird (1962). She was nominated for an Oscar in the Best Supporting Actress category. According to Sondra Locke's autobiography "The Good, the Bad and the Very Ugly", Mary auditioned for the role of Mick in The Heart Is a Lonely Hunter (1968), the part eventually played by Locke. Interviewed in "Growing Up on the Set: Interviews with 39 Former Child Actors of Classic Film and Television" by Tom Goldrup and Jim Goldrup (McFarland, 2002).