Judy Nunn is an Australian actress and author. Her breakout role was as scheming bisexual reporter Vicky Stafford in the risque soap opera The Box. Her character became a popular cult-figure in the series and Nunn continued in the role for the show's entire 1974-1977 run. In 1979 she briefly played Joyce Martin in the popular Australian series Prisoner and after that went on to appear as Dr. Irene Fisher in Sons and Daughters.

Ailsa Stewart in the soap opera Home and Away, played from 1988 until the character was killed off in 2000, is probably Nunn's most famous role. In 2002, she returned to the role as a ghost that only her former on screen husband, Alf Stewart could see.

Nunn married her husband, actor Bruce Venables in the same week in which she filmed Ailsa's marriage to Alf.

Nunn is also a screen writer and author. She has written scripts for television programmes such as Neighbours and Possession and in the 80s to turn her hand to prose. The result was two adventure novels for children, Eye in the Storm and Eye in the City, which remain extremely popular, not only in Australia but in Europe. Embarking on adult fiction in the early 90s, Judy's three novels, The Glitter Game, Centre Stage and Araluen, set respectively in the worlds of television, theatre and film, became instant bestsellers. Her subsequent bestsellers, Kal, Beneath the Southern Cross, Territory, Pacific and Heritage confirm her position as one of Australia's leading popular novelists.

In 2006, Nunn was a contestant on the television programme It Takes Two with her partner Glenn Shorrock.