(born 15 September 1968) is a Croatian lawyer, diplomat, and politician currently serving as Chief of Staff of the Office of the President of Croatia.

Miljenić was born in Dubrovnik, and graduated from the law faculty of the University of Zagreb in 1993.

He served from 1996 to 2000 as a diplomat in the Netherlands, and from 2000 to 2002 as president of Government Office for Cooperation with NGOs.

He was a deputy minister of Foreign Affairs and European Integration from 2002 to 2004 in Cabinet of Ivica Račan II.

After that, he worked as a lawyer until he was appointed the role of Minister of Justice on 23 December 2011, in the Cabinet of Zoran Milanović.