The Hereditary Princess Ekaterina of Hannover gave birth to a daughter on February 22 at the Henriettenstifts hospital in Hannover.
The little princess will be named Elisabeth. Her full name will be announced at her baptism.
Hereditary Prince Ernst August told the Hannoversche Allgemeine newspaper: "With my whole family I am very happy and grateful for the birth. My wife and I would like to thank the Henriettenstifts team for the friendly and competent care."
The Hereditary Prince and Princess moved from London to Hannover in January. They are living in the Fürstenhaus at Herrenhausen in Hannover.
The hospital was built with the support of Queen Marie of Hannover, the wife of King Georg V, the great-great-great-great-grandparents of Princess Elisabeth. The hospital was named for Queen Marie's grandmother, Princess Henriette of Nassau-Weilburg. The hospital was funded by the late Princess Henriette's estate.
This is the first grandchild for HRH The Prince of Hanover and his first wife, Chantal Hochuli.