Several months after returning from Queen Victoria's Diamond Jubilee celebrations in June 1897, Feodora became engaged to Prince Heinrich XXX Reuss of Köstritz (1864-1939), with the betrothal announced in early October. Born in Castle Neuhoff, he was the youngest son of Prince Heinrich IX Reuss of Köstritz (1827-1898) and Baroness Anne Marie Wilhelmine Helene of Zedlitz und Leipe (1829-1907). Henry's father died in early 1898, forcing a temporary postponement of the marriage. Rumours that the marriage had been cancelled proved to be untrue, and they married at Breslau on 24 September 1898 in a Lutheran ceremony. Princess Feodora was the only great-grandchild of Queen Victoria and only grandchild of German Empress Victoria to be married in their lifetimes; she married in 1898 and both the Queen and the German Empress died in 1901.