Lynne graduated in 1967 from Horton Watkins High School in Ladue, Missouri, a suburb of St. Louis, Missouri, where she starred as Emily in "Our Town" and was a gifted pianist.She trained as an actor at the Neighborhood Playhouse in New York City. Her classmates included Meryl Streep and Diane Keaton. She adopted Deerfield as her name because Hirschfeld, when translated from German to English, is Deerfield.She married three times. Her first husband was Paul Mates, a Wall Street lawyer. In 1975, she married Bill Beutel, the late ABC news anchor. After they divorced, she married Michael Kelly who preceded her in death.She returned to St. Louis in the mid-1980s.