 The current head of the royal house is Nicholas II Petrović-Njegoš, Crown Prince of Montenegro.Since 2011 the head of the royal house has an official role in Montenegro.On 13 November 1918 the King of Montenegro, Nicholas I, was deposed by the Podgorica Assembly which voted to unite Montenegro with the Kingdom of Serbia under his son-in-law King Peter I of the House of Karađorđević.