She became the second wife of Louis VI of France (1081-1137), whom she married on August 3, 1115. They had eight children, the second of whom became Louis VII of France. Adelaide was one of the most politically active of all France's medieval queens consort. Her name appears on 45 royal charters from the reign of Louis VI. During her tenure as queen, royal charters were dated with both her regnal year and that of the king. Among many other religious benefactions, she and Louis founded the monastery of St Peter's (Ste Pierre) at Montmartre, in the northern suburbs of Paris. She was reputed to be "ugly," but attentive and pious. She and Louis had seven sons and one daughter:
Afer Louis VI's death, Adélaide did not immediately retire to conventual life, as did most widowed queens of the time. Instead she married Matthieu I of Montmorency, with whom she had one child. She remained active in the French court and in religious activities.
Adélaide is one of two queens in a legend related by William Dugdale. As the story goes, Queen Adélaide of France became enamoured of a young knight, William d'Albini, at a joust. But he was already engaged to Adeliza of Louvain and refused to become her lover. The jealous Adélaide lured him into the clutches of a hungry lion, but William ripped out the beast's tongue with his bare hands and thus killed it. This story is almost without a doubt apocryphal.
In 1153 she retired to the abbey of Montmartre, which she had founded with Louis VII. She died there on November 18, 1154. She was buried in the cemetery of the Church of St. Pierre at Montmarte, but her tomb was destroyed during the Revolution.