Mary Elizabeth "Sissy" Spacek, at exactly 5ft 1 ½ (156.2 cm), is an American actress and singer whose petite stature has been central to her iconic, relatable screen presence. Born in Quitman, Texas, her diminutive height perfectly suited her breakout role as the telekinetic teen in Carrie (1976), enhancing her vulnerable intensity. It also defined her Oscar-winning portrayal of country singer Loretta Lynn in Coal Miner's Daughter (1980), capturing the real-life star's own slight build. Spacek's career highlights include powerful performances in Badlands (1973), 3 Women (1977), Missing (1982), The River (1984), Crimes of the Heart (1986), The Straight Story (1999), and In the Bedroom (2001), where her compact frame amplified emotional depth and everyday authenticity.