Mary Badham
With no prior acting experience, Mary Badham won the role of Gregory Peck's tomboy daughter Scout in "To Kill a Mockingbird" (1960) over 2000 other applicants. The novice thespian won praise and earned a Best Supporting Actress Oscar nomination for her naturalistic, unaffected performance. Badham only appeared in two other films, as the narrator who recalls the romantic exploits of her older sister (Natalie Wood) in "This Property Is Condemned" and as a girl who assists an heir outwit his murderous relative in and "Let's Kill Uncle" (both 1966). After a few appearances on TV episodes of shows like "Dr. Kildare" and "Twilight Zone," she retired from acting and moved to a Virginia farm. Her older brother is director John Badham.