PML-N Vice President Maryam Nawaz and Opposition Leader in the Punjab Assembly Hamza Shahbaz have reached the hotel, while PML-N members and members of the PTI's Jahangir Tareen and Aleem Khan are already present there.
PML-N leader and MPA Rana Mashhood Ahmad Khan has claimed that more than 200 MPAs are present at the hotel for the session.
The Tareen and Aleem groups have parted ways with the PTI and Prime Minister Imran Khan and decided to support the Opposition's candidate for the chief minister's office.
The chief minister's office had fallen vacant after PTI's Usman Buzdar resigned following PM Imran Khan's decision to nominate PML-Q's Pervaiz Elahi as the new CM.
Hours before this, the PML-N leader had said that she would attend the "Punjab Assembly ijlaas" to support Hamza — "who clearly has the majority" in the provincial assembly.