Marie (Maria) Friberg (1852–1934), was a Swedish opera singer (alto) of the Royal Swedish Opera. She is known for her relationship to of King Oscar II of Sweden, with whom she allegedly had two sons.
In 1883, Friberg aroused attention in the press when she performed as the bride in "Lycko-Pers resa" by August Strindberg with the personal Monogram of Oscar II in the bridal crown at Nya teatern in Stockholm. The paper Dagens Nyheter reported that Friberg was housed as the kings mistress with their two sons in a house owned by the monarch.
In 1891, she married the French noble Pascal d'Aubebard vicomte de Ferussac, who adopted her two sons. In 1893, she married Edvard Leman (1841–1922).