Sharif and opposition leader Raja Riaz will meet in the afternoon, said the official in the prime minister's office, who declined to be identified pending the announcement of the meeting.
Under the constitution, the two have three days to reach agreement on a caretaker. If they can't, the decision will go to a parliamentary committee, and if it can't, then the Election Commission of Pakistan will decide.
The lower house of parliament was dissolved on Wednesday, three days before the end of its five-year term on Aug. 12.
A general election in the South Asian country of 241 million people should be held in 90 days but it could be delayed for several months because the election commission has to redraw the boundaries of hundreds of constituencies based on a new census data.
