Ursula Wolters, director Dieter Wedel's widow, died just a few days after her husband.
The responsible law firm confirmed this on Monday in Munich.
The "Bild" newspaper reported about it first.
Wolters died in Hamburg after a serious illness, according to the statement by the lawyers around Peter Gauweiler.
Director Wedel ("The Great Bellheim", "The Shadow Man") died on July 13 at the age of 82, shortly before a Munich court wanted to announce whether it would try him for a rape allegation.
Wedel had always denied the allegations.
Wolters had also publicly defended her husband.
The allegations are "absurd," Wolters said in an interview with the magazine "Bunte" in January 2018. "I know that my husband is not one who abuses women or does violence to them." She finds the situation "oppressive," said Wolters continued at that time.
Wolters and Wedel met at the age of 27 and were a couple for many years.
At times they lived in an open relationship, the director also had other partners.
In an interview with the German Press Agency, Wedel said of Wolters: "I'm lucky to have a partner who I can fully rely on, who has my back one hundred percent.
She is also a key advisor to me, conducts negotiations and makes my contracts.”
Wolters and Wedel both died in Hamburg - both were seriously ill.
Exactly when Wolters died was not known.