Kastelicova will be based in HBO's Budapest office in charge of HBO Europe's documentary production out of its offices in Warsaw, Prague and Bucharest.

She is a documentary film-maker herself, who worked at TV Slovenia (www.rtvslo.si) where producing award-winning documentaries and most recently was head of Documentary Development and Commissioning Editor.

She was also the Slovenian national coordinator for INPUT, the international organisation of TV professionals, and a member of the editorial board for documentaries at the Slovenian Film Fund (www.film-sklad.si) in 2011.

Speaking of Kastelicova's appointment, Antony Root, EVP Original Programming and Production, HBO Europe, said in a statement, "Her strong editorial, managerial and production skills, together with her enviable reputation and contacts, both locally and internationally, will be a huge asset as we take our documentary output to the next level."

HBO Europe provides basic and premium channels to 15 countries: Hungary, the Czech Republic, Slovakia, Poland, Romania, the Netherlands, Bulgaria, Moldova, Slovenia, Croatia, Serbia, Kosovo, Montenegro, Macedonia and Bosnia and Herzegovina.