Joanna Moore (November 10, 1934-November 22, 1997) was an American film and television actress best known for her guest roles on the popular television shows of the 1960s, most notably as Sheriff Andy Taylor's love interest, Peggy 'Peg' McMillan in four episodes of The Andy Griffith Show. She was married to actor Ryan O'Neal from 1963 to 1967, and was also the mother of actors Griffin and Tatum O'Neal. She was born Dorothy Cook, the elder of two daughters, in Americus to Henry Cook, an atomic scientist, and Dorothy English Cook. When she was a child, her parents and younger sister were involved in a fatal car accident. Her mother and sister died immediately, while her father died a year after the accident from the injuries he sustained.
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