Thea Beatrice May Astley (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.
Astley has a significant place in Australian letters as she was "the only woman novelist of her generation to have won early success and published consistently throughout the 1960s and 1970s, when the literary world was heavily male-dominated".