[1] Her numerous television roles include playing in Number 96 as Carol Finlayson (1974-1975), The Young Doctors (1976–77), as Nurse Lisa Brooks, Cop Shop as Detective Danni Francis (1977–83), for which she twice won the Logie Award for Most Popular Actress, Prisoner as Lorelei Wilkinson (1986), Richmond Hill as Janet Bryant (1988), Home and Away as Bridget Jackson (1990) and Neighbours (2011).
Early roles were Carol Finlayson in Number 96 (her sister Carmen Duncan had previously acted in this serial), followed by Lisa Brooks in The Young Doctors.
After Cop Shop ended she played Lorelei Wilkinson in Prisoner in 1986, then was Janet Bryant in Richmond Hill (1988) for its entire run, Bridget Jackson in Home and Away,[3] and Joan Hayden in Paradise Beach.
[4] In 2011 Duncan joined the cast of Neighbours as Carolyn Johnstone, a love interest for Harold Bishop (Ian Smith).
They opened acting school, The Australian Film & Television Academy (TAFTA)[8] together on the Gold Coast in 1994.