Nadejda Mikhailovna Mountbatten, Marchioness of Milford Haven (née Countess Nadejda Mikhailovna de Torby, until 1917 Princess George of Battenberg; 28 March 1896 – 22 January 1963), was a member of the Russian imperial family who married a German prince but became a British subject and aristocrat.

Her paternal grandparents were Grand Duke Michael Nicolaievich of Russia and Princess Cecily of Baden.

Nicknamed "Nada", she attended the 1914 Kenwood House ball given in her and her sister's name, arranged to mark her coming-out at 18 years of age.

[1][page needed][2][3] Before leaving for the United States to testify, Lady Milford Haven publicly denounced the maid's testimony as "a set of malicious, terrible lies".

[4] However, in June 2022 her grandson Lord Ivar Mountbatten stated in an interview with the Tatler "my aunt [sic] Nada was a lesbian.