Born in Hollywood, Brittany began acting when she was five years old, making her debut in an episode of the syndicated series "Sea Hunt". She appeared in three episodes of "The Twilight Zone" (CBS), the best known of which was her third, "Caesar and Me" (1964), that teamed her with a ventriloquist's dummy for a life of crime. On the big screen, billed as Suzanne Cupito, she was 'Baby' June in the 1962 film version of the Broadway musical "Gypsy", appeared as one of the schoolgirls in "The Birds" (1963), and as Henry Fonda's teenaged daughter in "Yours, Mine and Ours" (1968). After time away from Hollywood for college and a stab at modeling, she returned to the limelight with her new moniker. She occasionally appeared in TV-movies and as a guest on series before the role of Mary in "In Search of Historic Jesus" (released theatrically in 1980; aired on NBC in 1981) helped give her a new profile. After her stint on "Dallas", Brittany starred as an ambitious magazine writer in the short-lived Aaron Spelling-produced "Glitter" (ABC, 1984) and won attention as a youthful paramour of the future president in "LBJ: The Early Years" (NBC, 1987). Although Brittany seemed to be everywhere during the 80s-- hosting "Miss Teen USA" (CBS, 1986), appearing on variety specials and shows, by the end of the decade her career had somewhat lost its momentum. For a few years, she concentrated on her personal life and returned to acting in 1994 with less fanfare in guest spots on "Melrose Place" and "The Nanny". She also appeared in modestly-budgeted features, such as "Riders in the Storm" (1995) and "Legend of the Spirit Dog" (1997).