In 1982, Dennison landed her first and only acting role in the ABC television sitcom incarnation of 9 to 5. Before the show premiered, she stated in a People magazine interview: "I'm sure people will compare me to Dolly—it's only human nature." Her role, as bombshell secretary Doralee Rhodes, had been originated by her older sister, Dolly Parton, in the hit 1980 theatrical film of the same name. 9 to 5 was shot before a live studio audience and co-starred Rita Moreno and Valerie Curtin. The series had an impressive beginning in the ratings, but after a retooling (including the addition of Leah Ayres to the cast), the series was canceled by ABC after 33 episodes in 1983. The sitcom proved popular in reruns, leading producers to revive it in first-run syndication in 1986. Sally Struthers joined the cast, and the sitcom's popularity revived, producing another 52 episodes before ending in 1988.