Kitty Crowther is the Belgian daughter of a British father and a Swedish mother. She was born and grew up in Uccle, part of Brussels, in Belgium. She and her husband now live in Blanmont with their two sons. She studied Graphic Arts at the Institut Saint-Luc in Brussels. She works mainly in French, occasionally in Dutch, and has as of 2010 created some 35 books of her own, and has illustrated books of others as well, e.g. work by Carl Norac, Bart Moeyaert and Toon Tellegen.

She made her debut in 1994 with Mon royauml (My kingdom). The jury of the Gouden Griffel awarded her a "Vlag en Wimpel" in 1997 for the illustrated book Mon ami Jim. Further recognition followed in 2003 and 2005, when she received the Silver Pencil for In het pikkedonker (In the pitch dark) and Kleine Dood en het meisje (Little Death and the girl).