Catherine "Kate" de Castelbajac (born Katherine Lee Chambers in Santa Barbara, California) is a former model and fashion journalist who now works as an image consultant and educator.
While a senior at Barnard College of Columbia University, where she earned a BA in English literature, Chambers was discovered by the photographer Jean Pagliuso and the editors of Mademoiselle.
The Mademoiselle feature helped launch Chambers into a career in high fashion, as she began working with the Ford Modeling Agency and such photographers as Arthur Elgort and Patrick Demarchelier, appearing in magazines like Harper's Bazaar.
During the late 1970s and early 1980s she was among the most popular models in Europe, working for French Vogue, Elle, Cosmopolitan, and represented the line of cosmetics Orlane B23.
She began her business career in 1983, working as the accessory director for her husband's design company, Jean Charles de Castelbajac, SA., a position she continued until her divorce in 1995.
Castelbajac was sued in 1995 by energy magnate Bill Koch to evict her from his $2.5 million condominium at the Four Seasons Hotel in Boston.