Thea Beatrice May Astley AO (25 August 1925 – 17 August 2004) was an Australian novelist and short story writer. She was a prolific writer who was published for over 40 years from 1958. At the time of her death, she had won more Miles Franklin Awards, Australia's major literary award, than any other writer. As well as being a writer, she taught at all levels of education – primary, secondary and tertiary.