The House of Petrović-Njego (Cyrillic: Петровић-Његош) has been the Royal House of Montenegro since 1696. Montenegro had enjoyed de facto independence from the Ottoman Empire from 1711 but only received formal international recognition as an independent principality in 1878.
Montenegro was ruled from inception by Vladikas, Prince-Bishops, who had a dual temporal and spiritual role. In 1852 this role was amended to be a purely temporal office. In 1910 the ruling prince Nikola I announced his elevation to King. In 1916 King Nikola I was ousted by the invasion and occupation of his country by Austria-Hungary that was followed by invasion and occupation by Serbia and his formal deposition in 1918 as Montenegro was annexed by the emergent Kingdom of Serbs, Croats and Slovenes.
A period of eighty years of control from Belgrade followed during which Nikola I died in exile in France in 1921 followed shorty afterwards by the surprise abdication of his son and heir, Danilo III, the same year. The latter's nephew, Michael Petrović-Njego, inherited the titles of his predecessors whilst in exile in France and survived arrest and internment by order of Adolf Hitler for refusing to head up a puppet Montenegrin state aligned to the Axis Powers. He was succeeded by his son Nicholas Petrović-Njego in 1986. Nicholas returned to Montenegro to support the Montenegrin independence movement that went on to achieve full sovereignty for the Republic of Montenegro in 2006 referendum.
The present Head of the Royal House uses the regnal name Nicholas II of Montenegro.
Heads of the House of Petrović-Njego (1696Present)
Vladikas (Prince-Bishops) of Montenegro (16961852)
* Prince-Bishop Danilo I ćepčev Petrović-Njego (16961735)
* Prince-Bishop Sava II Petrović-Njego (17351781)
* Prince-Bishop Vasilije III Petrović-Njego (joint ruler with Sava II (17501766)
* Prince-Bishop Petar I Petrović-Njego (Saint Peter of Cetinje, Sveti Petar Cetinjski) (17821830)
* Prince-Bishop Petar II Petrović-Njego (18301851)
* Prince-Bishop Danilo II Petrović-Njego (18511852) Restyled himself as Knjaz or Prince 1852.
 Princes of Montenegro (1852-1910)
* Prince Danilo II Petrović-Njego (18521860)
* Prince Nikola I Petrović-Njego (18601910) Restyled himself as Kralj or King 1910.
 King of Montenegro (1910-1918)
* King Nikola I Petrović-Njego (19101918)
 Titular Rulers of Montenegro (1918Present)
* King Nikola I Petrovic-Njegos (19181921)
* King Danilo III Petrović-Njego (1921)
* Crown Prince Michael I Petrović-Njego (19211986)
* Crown Prince Nikola II Petrović-Njego (1986Present, current Pretender to the Throne)
o Hereditary Prince Boris Petrović-Njego (born 1980), the Grand Duke of Grahovo and Zeta, is his heir