Nathalie Marie Andrée Baye (July 6, 1948 – April 17, 2026) was a French film, television, and stage actress. She began her career in 1970 and has appeared in more than 80 films. A ten-time César Award nominee, her four wins were for Every Man for Himself (1980), Strange Affair (1981), La Balance (1982), and The Young Lieutenant (2005). Her other films include Day for Night (1973), Catch Me If You Can (2002), Tell No One (2006), and The Assistant (2015). In 2009, she was appointed a Chevalier of the Legion of Honour.

Baye was born in Mainneville, Eure, Normandy to Claude Baye and Denise Coustet, two painters. At 14, she joined a school of dance in Monaco. Three years later she went to the United States. On returning to France, she continued with dance but also registered for the Simon Course and was admitted to the Conservatoire, from where she graduated in 1972 with a second prize in comedy, dramatic comedy, and foreign theatre.