BEIRUT (Reuters) - Lebanon's Prime Minister-designate Saad al-Hariri will announce a new national unity government in the next two days after clinching a deal with the opposition on its make-up, politicians from both sides said on Saturday.

Lebanon has been without a functioning government since Hariri led his coalition, backed by the United States and Saudi Arabia, to victory in a June parliamentary election against Iranian- and Syrian-backed Hezbollah and its allies.

A government acceptable to all main parties is seen as key to maintaining stability in a country facing sectarian and political tensions, as well as a huge debt burden.