Prime Minister Viktor Orbán is set to represent Hungary at the inauguration ceremony of Ukraine's president-elect Petro Poroshenko in Kiev on Saturday.

The European Union is likely to be represented by EC President Jose Manuel Barroso. US Vice President Joe Biden, Polish President Bronislaw Komorowski, his Lithuanian and Swiss peers Dalia Grybauskaite, and Didier Burkhalter, respectively, have accepted the invitation, along with the president of OSCE.