Marie Justine Benoîte Favart (née Duronceray) (French pronunciation: [maʁi ʒystin bənwat favaʁ]; 15 June 1727 – 22 April 1772) was an operatic singer, actress, playwright and dancer, the wife of the dramatist, Charles Simon Favart.

Madame Favart is largely responsible for the 18th-century change in Parisian operatic taste from French standards to performances of a lyric type adapted from Italian models, which developed later into the genuine French comic opera.

She was also a bold reformer in matters of stage costume, playing the peasant with bare arms, in wooden shoes and linen dress, and not, as heretofore, in court costume with enormous hoops, diamonds and long white kid gloves.

With her husband, and other authors, she collaborated in a number of successful pieces, and one La fille mal gardée she produced alone.

Mme Favart was established by the marshal in a house at Vaugirard; proving a fickle mistress, she was suddenly arrested and confined in a convent, where she was brought to unconditional surrender in the beginning of 1750.