Ceallaigh S. MacCath-Moran was born Kelly Sue Suhre in Dayton, Ohio just a few months before Neil Armstrong took "one small step for man, one giant leap for mankind." She graduated with Distinction from the University of Toronto in 2001 after earning a B.A. in Celtic Studies and graduated with High Distinction from the University of Maine in 2003 after earning a M.A. in English. In 2006, she attended the Clarion Science Fiction and Fantasy Writers' Workshop.
Ceallaigh's poetry and fiction have appeared or are forthcoming in Strange Horizons, Clockwork Phoenix: Tales of Beauty and Strangeness, The Pagan Anthology of Short Fiction, PanGaia, newWitch, Murky Depths, Mythic Delirium, Goblin Fruit and others. At present, she is working on the first of nine novels in a series entitled Petals of the Twenty Thousand Blossom and a short story collection entitled Spirit Boat. When she isn't writing, she works as a freelance folk musician in Southeast Michigan.