Margot Knight is an Australian actress, best known for playing two roles in two highly popular television serials. In Prisoner, she played inmate Sharon Gilmour in 1980 and junior prison officer Terri Malone in 1985. In Neighbours, she played Jean Richards in 1986 and Tracey Cox in 1997. Her Prisoner appearances are notable because in addition to being one of the few cast members to play both a prisoner and a prison warder in the series, both of her roles were as the lesbian love interest to the show's main lesbian character at the time. Sharon Gilmour was the scheming girlfriend of long-term inmate Judy Bryant (Judy's long stay in prison actually began because she deliberately had herself imprisoned to be with Sharon), and Terri Malone was a young prison officer who moved in with warder Joan Ferguson.