Child Emperor Dilip Singh
On 15 September 1843, both Sher Singh and Prime Minister Dhyan Singh were assassinated in a revolt led by Ajir Singh Sindhawalia. The next day, however, the killers were killed in a counter-insurgency led by Dhyan's son, Hira Singh. At the age of twenty-four, Hira Singh was elected Prime Minister in place of his father, and he appointed five-year-old Sher Khurdlip Singh as emperor. Koh-i-Noor was now tied to the child emperor's arm in a Lahore court. Dilip Singh and his mother Mahand Jund Kaur were living in Jammu till then, it was the rule of Gulab Singh Empire.
After the assassination of his nephew Prime Minister Hira Singh on March 27, 1844 and the ensuing First Anglo-Sikh War, Gulab Singh himself continued to lead the Sikh Empire as its Prime Minister, and despite losing the war, he Became Maharaja of Jammu and Kashmir on 16 March 1846 under the Treaty of Amritsar.