Negotiations took over a year before Marie Jeanne Baptiste went to Annecy with her grandmother Françoise of Lorraine on 1 May 1665 to meet her future husband. Marie Jeanne Baptiste married Charles Emmanuel II on 20 May 1665 at the Castello del Valentino amid great celebration.
Over a year was required for negotiations before Marie Jeanne Baptiste, accompanied by her grandmother Françoise of Lorraine, traveled to Annecy on 1 May 1665 to meet her future husband. On 20 May 1665, she married Charles Emmanuel II at the Castello del Valentino with great celebration.