[1] Born in Montreal, Quebec, Stewart left for Paris, France, in 1958, to study art.

Besides her cinema career, Stewart regularly appeared on television in shows such as Les Jeux de 20 heures and L'Académie des neuf.

In 1966 Stewart appeared in The Saint (S5,E9 'The Better Mousetrap') as Natalie Sheridan, a love interest for Simon Templar (The Saint), who is solving a series of jewel thefts in Cannes.

Notably, she is also the English-language narrator of Chris Marker's 1983 documentary, Sans Soleil.

Stewart had a daughter, Justine, with the French director Louis Malle.