Kathleen Jennings is a writer and illustrator who grew up in Western Queensland.
Jennings' illustration work has won Ditmar Awards and been shortlisted for three World Fantasy Awards. She has illustrated for various Australian and international publishers and periodicals, including Tor.com, Small Beer Press, Subterranean Press, Tartarus Press, Ticonderoga Publications, FableCroft Press, Odyssey Press, Andromeda Spaceways Inflight Magazine, and Canberra Speculative Fiction Guild. She has also produced a number of collaborative works with Angela Slatter.
In addition to illustration, Jennings also writes short works, including comics. Her short comics include the steampunk 'Finishing School : A Colonial Adventure' and 'A Small Wild Magic', which was a finalist in the Aurealis Awards.
In 2017, she was one of the illustrators (along with American illustrator Cassandra Jean) on the tenth-anniversary edition of American novelist Cassandra Clare's City of Bones, the first in her best-selling Mortal Instruments trilogy. She also drew the internal maps for American author Holly Black's The Cruel Prince (2018) and The Wicked King (2019), and produced both the cover art and internal illustrations for Kij Johnson's The River Bank (2017), a sequel to Wind in the Willows. In 2019, she illustrated Aidan Doyle's The Writer's Book of Doubt.
In 2019, she was one of the judges for the World Fantasy Awards.