Marie-Thérèse Blonel de Phalaris (1697–1782), was a French aristocrat.
[1] She was married to George d'Entragues, duc de Phalaris, who went bankrupt and abandoned her to flee France to escape his creditors.
Her spouse returned from Spain to take advantage of his wife's position, after which the regent dismissed her as his favorite and replaced her with Sophie de Brégis, comtesse d'Averne.
After d'Averne was dismissed, Sabran introduced the regent to a sixteen-year-old convent girl, Mlle Houel, in 1723.
The regent tired of the girl after but a few months, after which he replaced her by resuming his relationship with Phalaris, who then became his last official mistress.