Security was discreetly stepped up in Ljubljana Tuesday morning, hours ahead of the first visit to Slovenia by the Queen of England to the independent Slovenia in the afternoon, reported dpa.
The Ljubljana airport would shut down to other traffic shortly before and after the 2 pm (1200 GMT) arrival of the Queen and the Duke of Edinburgh.
Streets near the hotel where Queen Elisabeth II and her husband would spend the night would also be closed to traffic, but otherwise life in the Slovenian capital went on as usual.
The visit was arranged on invitation by Slovenian President Danilo Turk.
Slovenia claimed independence from Belgrade following a short war in 1991. The country then embarked a remarkable transition to become the first ex-Yugoslav republic to join EU and NATO, in 2004.
The Queen has been in Slovenia before, in 1976, when it was still a part of the then Communist Yugoslavia.
Following her stay in Slovenia, the British monarch visit Slovakia, also for the first time.