Nancy McKeon was born in Westbury, New York, on Monday, April 4th, 1966, to Don & Barbara McKeon, began modeling baby clothes for the Sears & Roebuck catalog at the age of two and she and her brother did over sixty-five commercials in seven years. When her brother, Philip McKeon, won a role on the TV series, Alice (1976), the family then moved to Los Angeles.
Her first real acting break came when she did the short-lived TV series, Stone (1979), and occasionally guested on Starsky and Hutch (1975). The producers of The Facts of Life(1979) were so impressed by Nancy's personality & acting performances as the street-wise girl in a pilot called "Dusty", they decided to sign her & add her, as a new character to play "Jo" on "The Facts of Life". Nancy has starred in the television movies, High School U.S.A. (1983), Poison Ivy (1985), This Child Is Mine (1985) and Firefighter (1986). She provided the off-screen voices for animated shows like ABC Weekend Specials: The Puppy's Great Adventure (1979).