Marie-France Pisier, a French actress who was discovered by Francois Truffaut and appeared in three of his films, including “Love on the Run,” and who worked with notable directors like Andre Techine and Luis Bunuel, died Sunday at her home in Saint-Cyr-sur-Mer in the South of France. She was 66.

Her husband, Thierry Funck-Brentano, discovered her body in the swimming pool of their home, Agence France-Presse, the French news agency, reported. The cause of death was not known, but foul play is not suspected, the investigating magistrate in Toulon said.

Pisier, a stunning beauty with refined features, caught Truffaut’s eye when, at the age of 17, she successfully auditioned for the part of Colette Tazzi, the spirited but maddeningly elusive love object of Jean-Pierre Leaud’s Antoine Doinel in “Antoine and Colette.” The film, 32 minutes long, was Truffaut’s contribution to the anthology film “Love at 20.”

Smitten, Truffaut briefly left his wife and children for Pisier. The romance was short-lived, but Pisier appeared twice more as Colette in Truffaut films — in a small uncredited role in “Stolen Kisses” (1968) and in “Love on the Run” (1979), which she helped write.

In the film, her character, now a successful lawyer, handles Antoine with the same dismissive ease as she did in their youth.