Kathleen Jennings is a writer and illustrator who grew up in Western Queensland and is now (as of 2017) based in Brisbane.
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 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.