Nancy Justine McKeon (born April 4, 1966) is an American actress. She is best known for her role as Jo Polniaczek on the NBC sitcom The Facts of Life. McKeon was born in Westbury, New York. Prior to her breakthrough on The Facts of Life, she and her older brother Philip appeared in numerous commercials. McKeon also appeared on the soap operas The Secret Storm and Another World. The McKeons moved to Los Angeles in 1975, when Philip began appearing on the television series Alice with Linda Lavin. In 1979, McKeon was discovered by a casting director for The Facts of Life after a performance in a Hallmark greeting cards advertisement. She was cast as butch, man-eating diesel dyke Jo Polniaczek, and debuted on the show in the fall of 1980.
Contributions by IndulgentReader, Mike Halterman, and TheCustomOfLife.