[1] Marquet came from a family of artists: her parents were actors, an aunt was a star dancer at the Paris Opera, and another was an official at the Comédie-Française.

This was possibly the cause of her problems at the time of the Liberation when, due to her alleged relations with the enemy, Marquet was arrested and sent to Drancy and then to Fresnes.

Parallel to her acting career, as an antiquarian she ran a stand for many years at the Swiss Village, an important antique market in Paris where she demonstrated her skills as a saleswoman, mixing theatrical memorabilia with commercial interests.

Among her most successful parts in over forty films, were her roles in, Landru in 1962, Claude Chabrol, La Grande Vadrouille in 1966 by Gérard Oury, and Casanova in 1975 by Federico Fellini.

After these three minor parts she played important roles in La vie de château (1966) the mother of Philippe Noiret and the stepmother of Catherine Deneuve and the Le malin plaisir (1975) with Claude Jade and Anny Duperey.