Who married Nicholas I of Montenegro?

Nikola I Petrović-Njegoš (Serbian Cyrillic: Никола I Петровић-Његош; 7 October [O.S. 25 September] 1841 – 1 March 1921) was the last monarch of Montenegro from 1860 to 1918, reigning as prince from 1860 to 1910 and as the country's first and only king from 1910 to 1918. His grandsons were kings Alexander I of Yugoslavia and Umberto II of Italy, among others.

Milena Vukotić, née le 4 mai 1847 a Cetinje et morte le 16 mars 1923 à Antibes est princesse puis reine de Monténégro à la suite de son mariage avec Nicolas I^er de Monténégro.