Having finished elementary and secondary school in Podgorica, Knežević graduated Serbian language and South Slavic literature at the Faculty of Philosophy in Nikšić.

[4] He decided to enter political life in the mid-2000s by joining Srđan Milić's Socialist People's Party (SNP), in which he was one of the representatives in the parliament of Montenegro.

Before the 2012 parliamentary election, the right-wing faction of the SNP led by Knežević and their former president Predrag Bulatović left the party and joined the Democratic Front (DF) alliance independently.

[citation needed] After being found guilty, Knezevic said that the verdict was an indicator of trapped state institutions, particularly judicial ones, and announced that he would appeal against the court's judgement.

[9] On July 12, 2024, the High Court in Podgorica acquitted Milan Knežević and all other defendants charged with organizing and preparing the alleged 2016 coup d'état.