Umberto II of Italy
Prince Dimitri and Prince Michael of Yugoslavia are the first set of twins born to Prince Alexander of Yugoslavia and his first wife, Princess Maria Pia of Savoy, the eldest daughter of Umberto II of Italy in 1958. Maria Pia had a second set of twins, Prince Serge and Princess Helene of Yugoslavia in 1963. they have a younger half-brother, Prince Dushan of Yugoslavia, from their father's second marriage to Princess Barbara of Liechtenstein.