Countess Sophie Friederike Juliane von Dönhoff (17 October 1768 – 28 January 1838)[1] was a German lady-in-waiting and a morganatic spouse by bigamy to King Frederick William II of Prussia.

In contrast to Julie von Voß, who had behaved with discreet gentleness, Sophie von Dönhoff was described as an haughty insolent upstart who attempted to be treated like a queen rather than as a morganatic consort by demanding everyone at court save the queen give precedence to her.

[2] She also tried to influence the king against Wilhelmine von Lichtenau and Bischoff Werder and participate in the affairs of state, advising him against participation in the war against France by threatening him that she would "give him up altogether, if he entered with such levity upon so important and difficult an undertaking" as that of the invasion of France.

[2] The king, however, advised her to refrain from politics, was repelled by her temperament and started to neglect her, which caused her to react with more rage.

[2] One night at a concert in at Potsdam, she caused a famous scene when suddenly rushing with disheveled hair to the assembly and laid her infant at the king's feet, exclaiming: "There, take back your property!