Colleen Margaretta McCullough was an Australian author known for her novels, with her most well-known works being The Thorn Birds and The Ladies of Missalonghi.

Raised by her mother in Wellington and then Sydney, McCullough began writing stories at the age of 5. She flourished at Catholic schools and earned a physiology degree from the University of New South Wales in 1963. Planning to become a doctor, she discovered a violent allergy to hospital soap and instead turned to neurophysiology – the study of the nervous system's functions.

She found jobs first in London and then at Yale University in New Haven, Connecticut. After her beloved younger brother Carl died in 1965 at age 25 while rescuing two drowning women in the waters off Crete, a shattered McCullough quit writing for some time.