Harding graduated Virginia Commonwealth University, and moved to New York. She broke into show business in the CBS soap opera As the World Turns and appeared in several off-Broadway plays.
Those roles led Harding to Broadway, where she appeared in the comedy Take Her, She’s Mine in December 1961. She played Art Carney’s younger daughter and was opposite Elizabeth Ashley, who played Harding’s sister and won a Tony Award for her role.
From there, she joined The Richard Boone Show, an NBC-tv anthology that ran from 1963-1964, appearing as several characters. She also appeared in episodes of 1960s TV dramas like The Defenders, Dr. Kildare and The Fugitive, and in