Ceridwen is an Australian fiction writer, creative non-fiction writer, science writer and filmmaker based in Sydney. She went to Harvard University on scholarship as an undergraduate, and did her postgraduate studies in social anthropology at New York University.

Her most recent book of stories is Only the Astronauts (Penguin Random House, 2024).

Her debut novel, Blood Kin, was shortlisted for the Dylan Thomas Award and selected for the U.S. National Book Foundation’s "5 Under 35" honours list. Her second book, Only the Animals, won the inaugural 2014 Readings New Australian Writing Award.

She is also the author of In the Garden of the Fugitives; On J.M. Coetzee: Writers on Writers; Life After Truth; Inner Worlds Outer Spaces; and Mothertongues (with co-writer Eliza Bell and original songs by Keppie Coutts). She's the author of the bestselling Audible Original audio-novel Once More With Feeling, and writes feel-good romance fiction for Audible as Adeline Knight.    

Ceridwen's science writing has been recognised with an Australian Museum Eureka Award. With filmmaker Rowena Potts, Ceridwen is the co-founder of the Archival Futures Collective. Ceridwen and Zoë Sadokierski collaborate creatively as Animal Allegories.

Ceridwen is currently a Research Fellow at Macquarie University, and a Powerhouse Artistic Associate.